The Pew Research Center asked people of various religions and agnostic/atheists 32 questions about faith and their religious texts and published the results. Even I was surprised with the results:

Atheists and agnostics average 20.9 correct answers. Jews and Mormons do about as well, averaging 20.5 and 20.3 correct answers, respectively. Protestants as a whole average 16 correct answers; Catholics as a whole, 14.7.

I could insert some snide comment about people who profess to know what’s best for everyone (and works to impose that on others) would know more about what they’re preaching about. But seriously, though. The results of the study are pretty interesting – especially the part where atheists and agnostics have more knowledge of religion than those who practice it.

U.S. Religious Knowledge Survey – Pew Research Center via Kottke

(P.S. Sorry about the preaching pun)