My sister said, while I was packing up and leaving her and the crap WT behind, that the GB was a bunch of men with dementia. She knew that 1914 was wrong. Yet, she gets to go to a foreign language group, hangs out with the gossipers and takes little trips with some at the hall and believes she has the "truth". I asker her "if the bible says one thing, and the WT says something else, which one am I supposed to believe?" She said "it doesn't matter what the bible says" An hour later, she called up to say "don't tell anyone I said that"
She has the most convoluted thinking possible. I don't even think she's honest with herself. So there are those like that. Whatever makes it possible to stay in it, she'll think it up.
Then there are those that are more like "worldly JW's" They do many things that I would never have done while I was in JW land. So I don't think they are affected as much by "new light" that contradicts previous "light".
The true believers plod along with the blinders on. They lift there heads up every once in a while and wonder how they ended up in the opposite direction. But it is a habit and a duty to go back to plodding. After all, God is directing the GB and they would never lie.
Young ones may grow up believing it but are increasingly tempted by all of the easy ways to be "worldly" Phones, computers and fun everyday things school mates do. They get messed up more if they leave the "truth" by having fun but still believe.