I remember a post - a long time ago - by Maximus who said that for every 10 kids that are raised In The Truthâ„¢, 8 of them leave when they have the opportunity to do so. That would include baptized and unbaptized youths. The ones who get baptized would show up in the DFd/DAd statistics, but the smart ones who didn't get baptized would just disappear.
That must be part of the reason why they are letting kids get baptized younger and younger all the time... to keep some kind of death grip on them if they realize they will lose their family if they leave.