The mentality is that everything new from the GB must be an improvement by default. A gift from Jehovah..
At least thats what they will say.
Most I know feel that way as well. I also noticed that when brothers especially begin to read from memory the "old" NWT they stop and say oops, thats the OLD one. If they don't catch themselves you can be sure that some sister or brother will mention it to them. Old... lol