I can post that I read an article once that claimed that, per capita, there have been more successful Mormon sf and fantasy authors than from any other religion - and many of them are BYU grads as well.

Here are some links to info on the subject however:

http://www.nytimes.com/2013/11/09/us/mormons-offer-cautionary-lesson-on-sunny-outlook-vs-literary-greatness.html?pagewanted=all

http://mormonartist.net/articles/is-it-something-in-the-water/