It's that time of year again... time to compare the WT teachings concerning the Lord's Evening Meal to what the Bible actually says.
From the WT site: http://watchtower.org/e/19980315/article_01.htm
Jerusalem is shrouded in the soft light of dusk as the full moon rises over the Mount of Olives. In a large furnished room, Jesus and the 12 are reclining at a prepared table. "I have greatly desired to eat this passover with you before I suffer," he says. (Luke 22:14, 15) After a while the apostles are surprised to see Jesus get up and put his outer garments to one side. Taking a towel and a basin of water, he begins washing their feet. What an unforgettable lesson in humble service!—John 13:2-15.
However, Jesus knows that one of these men—Judas Iscariot—has already arranged to betray him to the religious leaders. Understandably, he becomes very distressed. "One of you will betray me," he reveals. The apostles are highly grieved at this. (Matthew 26:21, 22) After celebrating the Passover, Jesus tells Judas: "What you are doing get done more quickly."—John 13:27.
Once Judas has left, Jesus introduces a meal to commemorate his impending death. He takes a loaf of the unleavened bread, expresses thanks in prayer, breaks it, and instructs the 11 to partake. "This means my body," he says, "which is to be given in your behalf. Keep doing this in remembrance of me." He then takes a cup of red wine. After saying a blessing, he passes the cup to them, telling them to drink out of it. Jesus adds: "This means my 'blood of the covenant,' which is to be poured out in behalf of many for forgiveness of sins."—Luke 22:19, 20; Matthew 26:26-28.
Okay... let's compare that to the actual scriptures
Matthew 26
20 When, now, it had become evening, he was reclining at the table with the twelve disciples. 21 While they were eating, he said: “Truly I say to YOU , One of YOU will betray me.” 22 Being very much grieved at this, they commenced each and every one to say to him: “Lord, it is not I, is it?” 23 In reply he said: “He that dips his hand with me in the bowl is the one that will betray me. 24 True, the Son of man is going away, just as it is written concerning him, but woe to that man through whom the Son of man is betrayed! It would have been finer for him if that man had not been born.” 25 By way of reply Judas, who was about to betray him, said: “It is not I, is it, Rabbi?” He said to him: “You yourself said [it].”
26 As they continued eating, Jesus took a loaf and, after saying a blessing, he broke it and, giving it to the disciples, he said: “T AKE , eat. This means my body.” 27 Also, he took a cup and, having given thanks, he gave it to them, saying: “Drink out of it, all of YOU ; 28 for this means my ‘blood of the covenant,’ which is to be poured out in behalf of many for forgiveness of sins. 29 But I tell YOU , I will by no means drink henceforth any of this product of the vine until that day when I drink it new with YOU in the kingdom of my Father.” 30 Finally, after singing praises, they went out to the Mount of Olives.
No mention of there being a disctinction between the Passover and the new Memorial meal. In fact it says, "while they were eating..." as Jesus identified Judas as betrayer and then it says, "as they continuted eating..." so no distinction... and no mention of Judas even leaving, either before or after, so apparently Judas enjoyed the same Last Supper Jesus did.
Mark 14 Mark isn't even referenced in the WT article above but let's see what it says anyway
17 After evening had fallen he came with the twelve. 18 And as they were reclining at the table and eating, Jesus said: “Truly I say to YOU , One of YOU , who is eating with me, will betray me.” 19 They started to be grieved and to say to him one by one: “It is not I, is it?” 20 He said to them: “It is one of the twelve, who is dipping with me into the common bowl. 21 True, the Son of man is going away, just as it is written concerning him, but woe to that man through whom the Son of man is betrayed! It would have been finer for that man if he had not been born.”
22 And as they continued eating, he took a loaf, said a blessing, broke it and gave it to them, and said: “Take it, this means my body.” 23 And taking a cup, he offered thanks and gave it to them, and they all drank out of it. 24 And he said to them: “This means my ‘blood of the covenant,’ which is to be poured out in behalf of many. 25 Truly I say to YOU , I shall by no means drink anymore of the product of the vine until that day when I drink it new in the kingdom of God.” 26 Finally, after singing praises, they went out to the Mount of Olives.
Again the quote is "as they continued eating..." between when Judas dipped in the bowl to when the "memorial" portion took place. Also again, no mention of Judas leaving either before or after...
Luke 22
14 At length when the hour came, he reclined at the table, and the apostles with him. 15 And he said to them: “I have greatly desired to eat this passover with YOU before I suffer; 16 for I tell YOU , I will not eat it again until it becomes fulfilled in the kingdom of God.” 17 And, accepting a cup, he gave thanks and said: “Take this and pass it from one to the other among yourselves; 18 for I tell YOU , From now on I will not drink again from the product of the vine until the kingdom of God arrives.”
19 Also, he took a loaf, gave thanks, broke it, and gave it to them, saying: “This means my body which is to be given in YOUR behalf. Keep doing this in remembrance of me.” 20 Also, the cup in the same way after they had the evening meal, he saying: “This cup means the new covenant by virtue of my blood, which is to be poured out in YOUR behalf.
21 “But, look! the hand of my betrayer is with me at the table. 22 Because the Son of man is going his way according to what is marked out; all the same, woe to that man through whom he is betrayed!” 23 So they started to discuss among themselves the question of which of them would really be the one that was about to do this.
Now in this instance, Jesus instituted the emblem passing BEFORE he called out his betrayer, so Judas was in on the Last Supper...and yet again, no mention of when Judas left.
John 13
2 So, while the evening meal was going on, the Devil having already put it into the heart of Judas Is·car´i·ot, the son of Simon, to betray him, 3 he, knowing that the Father had given all things into [his] hands and that he came forth from God and was going to God, 4 got up from the evening meal and laid aside his outer garments. And, taking a towel, he girded himself. 5 After that he put water into a basin and started to wash the feet of the disciples and to dry them off with the towel with which he was girded. 6 And so he came to Simon Peter. He said to him: “Lord, are you washing my feet?” 7 In answer Jesus said to him: “What I am doing you do not understand at present, but you will understand after these things.” 8 Peter said to him: “You will certainly never wash my feet.” Jesus answered him: “Unless I wash you, you have no part with me.” 9 Simon Peter said to him: “Lord, not my feet only, but also my hands and my head.” 10 Jesus said to him: “He that has bathed does not need to have more than his feet washed, but is wholly clean. And YOU men are clean, but not all.” 11 He knew, indeed, the man betraying him. This is why he said: “Not all of YOU are clean.”
12 When, now, he had washed their feet and had put his outer garments on and laid himself down at the table again, he said to them: “Do YOU know what I have done to YOU ? 13 Y OU address me, ‘Teacher,’ and, ‘Lord,’ and YOU speak rightly, for I am such. 14 Therefore, if I, although Lord and Teacher, washed YOUR feet, YOU also ought to wash the feet of one another. 15 For I set the pattern for YOU , that, just as I did to YOU , YOU should do also. 16 Most truly I say to YOU , A slave is not greater than his master, nor is one that is sent forth greater than the one that sent him. 17 If YOU know these things, happy YOU are if YOU do them. 18 I am not talking about all of YOU ; I know the ones I have chosen. But it is in order that the Scripture might be fulfilled, ‘He that used to feed on my bread has lifted up his heel against me.’ 19 From this moment on I am telling YOU before it occurs, in order that when it does occur YOU may believe that I am [he]. 20 Most truly I say to YOU , He that receives anyone I send receives me [also]. In turn he that receives me, receives [also] him that sent me.”
21 After saying these things, Jesus became troubled in spirit, and he bore witness and said: “Most truly I say to YOU , One of YOU will betray me.” 22 The disciples began to look at one another, being at a loss as to which one he was saying [it] about. 23 There was reclining in front of Jesus’ bosom one of his disciples, and Jesus loved him. 24 Therefore Simon Peter nodded to this one and said to him: “Tell who it is about whom he is saying [it].” 25 So the latter leaned back upon the breast of Jesus and said to him: “Lord, who is it?” 26 Therefore Jesus answered: “It is that one to whom I shall give the morsel that I dip.” And so, having dipped the morsel, he took and gave it to Judas, the son of Simon Is·car´i·ot. 27 And after the morsel then Satan entered into the latter. Jesus, therefore, said to him: “What you are doing get done more quickly.” 28 However, none of those reclining at the table knew for what purpose he said this to him. 29 Some, in fact, were imagining, since Judas was holding the money box, that Jesus was telling him: “Buy what things we need for the festival,” or that he should give something to the poor. 30 Therefore, after he received the morsel, he went out immediately. And it was night.
Now, in John's account (john must have had some good weed back in those days..he does love to ramble on...) there is still no distinction between the Passover and any new meal being instituted. But in this account, Judas does leave after the dipping of the morsel...which according to Luke was actually part of the symbolic part of the meal...so again, Judas was in on the Last Supper.
In past years we've had some excellent posts about the history of the Gospels and the differences in time of their writings and how they were created to appeal to different peoples and the like, but to me...trying to look at it as a JW would....as the inerrent word of God...there is no way to be able to justify the WT teaching that there was a difference between the Passover and the Lord's Evening Meal. There's no way to prove that Judas left before the "emblems" were passed. This is another example of how the WT has twisted the scriptures...or the meaning of the scriptures...to fit their own particular ideas. When I was an active JW, I never read these accounts and compared one to the other. It wasn't until I was actually doubting and questioning did I do that and then I was struck at how convoluted the WT teaching is compared to what's actually written. Ah, the power of gullibility and laziness...