The estimable Dr. Kendall Harmon has re-posted an excerpt from a 2003 national survey of youth and religion. The survey indicated that young Episcopalians are less likely than average to believe in God, to feel close to God, etc., and that young people generally are “incredibly inarticulate about their faith, their religious beliefs and practices.”
Some commenters responded, for example, "That survey should be devastating to ECUSA! It not only is not doing its job with kids, it is turning kids away from religion." Certainly some Episcopal Sunday school programs leave much to be desired.
But at least part of the problem with Sunday school programs stems from the flaws in the content that's being taught.
I think it's fair to assume that in general, Episcopalian kids tend to be smart and well-educated. All their lives, we train them to be critical thinkers; to challenge longstanding assumptions; to be cautious about taking things for granted; to look for empirical evidence instead of relying on wishful thinking.
But then at church, we ask them to accept on faith a lot of assertions about God and Scripture that not only lack empirical support, they simply can’t be reconciled with other things the young people are learning about how the world works. (This comes, of course, after we’ve first misled them, and then later "enlightened" them, about Santa Claus, the Easter Bunny, and the Tooth Fairy.)
So it shouldn’t be a big surprise that, when told they should believe Christian dogma because the Bible says so, many young Episcopalians react with skepticism.
(See also Reasons for Doubt.)