The Fiction Gap?

Among the observations reported by NPR in its online BOOKS section is one asserting that a correlation exists between possessing the Y chromosome and favoring non-fiction books over fiction. This worries me to some extent: although my Goodreads bookshelf may betray this statement, I prefer reading non-fiction over fiction, particularly those of the summiting-some-peak or accomplishing-some-other-great-feat variety. This genre isn't always great reading, though. An "autobiography" of Cal Ripken Jr. that I read years ago, before he retired, was possibly the most poorly written couple hundred pages I made myself read. You'd think he could find a better ghostwriter, no?