Plenty of people have noticed how, when it comes to awards, a disproportionate number of them seem to go to men. The same can be true for annual "best of" lists.
Here's a blog entry that shows how some orchestras--once wildly dominated by men --have changed their proverbial tune by having blind auditions in carpeted rooms behind screens, so that the sound of the music is the only thing that being considered.
It would be really hard to judge a book without its cover. But it's interesting to think about. Here's the blog post.