Oh definitely.
At 34 I'm still figuring out "the world" and real people and real situations. Mentally I feel like I'm 18 or 19. I found I went through a low/depressed stage, then a rock and roll period for a good while after I left. Had a blast.
Now I'm somewhat calmer and less angry about my JW upbringing and try to focus on the present and future. Starting University in my early 30s at first felt silly but it's something I feel I should have done straight from school so I do it.
I've seen many cases of what I can only term as a delayed adolescence in the newly departed.
I'm guilty of this! /\
It's like I'm trying to catch up with everything I missed.