There are many factors that influence how much of a toll exiting will take on an individual. Some of these are family circumstances, past personal investment in the religion, personality and mental state.
For me the toll has been great and is ongoing. It's not that I haven't had other serious things in life to deal with, I have. But, I would rate all of those as comparatively insignificant when compared with the mind f*** of coming to terms with learning the truth about the truth and the implications on my life and relationships.
Your mileage may vary.