joe134cd - "...I have a theory that those who leave the religion at an older age do better than those who leave at a younger age... I think too that the reasons for leaving are quite different between the age groups..."
Agreed.
Based on my observation...
...young folks who leave do so typically because sometimes it's just too hard to follow all the rules (I personally suspect it's due to being typically outgoing/extroverted individuals who simply need a fuller life just to feel whole, whereas introverts and the socially awkward have a much easier time of it, but I could be wrong)...
...whereas older folks usually WTexit because they've figured out it's not actually The Truth.
There's always exceptions to both, of course.