On average, people who took the survey answered half the questions incorrectly, and many flubbed even questions about their own faith.
Those who scored the highest were atheists and agnostics, as well as two religious minorities: Jews and Mormons. The results were the same even after the researchers controlled for factors like age and racial differences.
I recently shocked a WELS friend when I mentioned that St. Paul's views on marriage, and celibacy are obvious attempts by him to ignore or squelch his homosexual desires. His so called "thorn in his side". She had never heard that interpretation, or that Paul even had a thorn in his side.