It is quite common. Being that JW's live a very sheltered life, it is difficult for them to adjust to the "world". And a lot of people cannot handle being shunned by their family. It is tough!
When I left, I remember I didn't have one single friend b/c I would not associate with anyone who was "worldly" before I left the religeon. My first friend was a guy from work who I hung out with. His name was Costa, he was a great guy! I gradually made friends from there but it was a tough few years...all the friends I have now are true friends though b/c they like me for me, not b/c I belong to the same cult as them.
I remember when I was still in, the majority of young people that got disfellowshipped always came back. Even if it was just to lead a double life!
MMO