I've always felt that this topic is one of the grayest areas for JW beliefs. They never want to come out and say that non-JWs are going to die. It's almost impossible to understand what their stance on it is.
My favorite field service moment was at the door with a brother whose faith was and is unshakable. After ten or fifteen minutes of conversation about Armageddon, the householder says, "So you're telling me that only Jehovah's Witnesses are going to survive Armageddon?" The brother wouldn't give in. He skirted the subject with replies like, "The Bible says that only those with an accurate Bible knowledge and who have faith in Jesus Christ will survive Armageddon." So of course, the man replied with his previous question, and their conversation went in circles for about four and half hours. It was beyond embarrassing. I was standing there hoping that the brother would just say, "Alright already, it's true. Jehovah's witnesses are the only ones who will survive!" But that never happens. Score another one for the truth. Pathetic.