[Amoniustauns]

Wow.

Why a wow? A ton of "Catholics" are nominally Catholic. Their parents were Catholic, they've been to Church on Christmas, but little else.

As for the survey results, it's not a surprise. Atheists would tend to study all religions a bit more, as they've actively rejected religion, especially more than those that believe in God, but aren't all that big on studying up on it (who are thrown in with the people who do actively study their relgion).