This is interesting. A new study has just been completed by the Pew Forum on Religion and Public Life. The study encompassed more than 35,000 people, a very large sample for a survey of this type. The results are here: http://www.boston.com/news/nation/articles/2008/02/26/us_religious_identity_is_rapidly_changing/
Here's the paragraph that caught my eye:
Among the study's more unusual findings: Jehovah's Witnesses have the worst record of any faith group at retaining their members. Hindus and Mormons are the least likely to be married to someone of another faith, and the least likely to be single. Mormons and Muslims have the biggest families. Three-quarters of American Buddhists are converts. Jews are the highest-income group in America, but Hindus are now the best educated: Nearly half of all adult Hindus have some post-graduate education.
Looks like someone besides us has noticed!
SNG