I stepped out for lunch so I don't know if he came out to the crowds. Attendance was 1200 and at least during the general sessions he did not come out from the back stage.
Lets get one thing clear. Wether he is a simpleton or can be compared to the speech impediment of Moises, you need to understand that God never picked people with weaknesses just for the heck of it or just because he had pity on people. That is an old WT propaganda technique to make you feel good if you are uneducated or you feel like you are not up to the task on field service or in the ministry school.
God picked uneducated people or people with speech impediments so he could show his power. So people would know for sure and had proof that he sent them. So that his contenders would not think much of them and feel like they were no threat. When the threat materialized, then people could say beyond reasonable doubt that this man or prophet definitely had God's spirit.
If Lett had gotten of the stage and had been unable to speak coherently or even be able to recite a bible verse without the bible, then I would have concluded that his ability to deliver the talk definitely came from a higher power. But, as you may conclude, that did not happen, therefore his is a buffoon.
The CO gave the preceding talk before him. When Lett got on stage for the first talk he wanted to thank the CO and his wife for their hard work but he did not remember their names. The translator had to remind him. Despite the fact that the presenter had just thanked "brother Con" for this speech. The man is incapable of even faking that he cares.