Ah! Got you. I could have included the history lesson and purchase of Createspace by Amazon.
Fiction does seem to do better among the indie author crowd, but I think that's going to change. There are a few indie non-fiction authors starting to shake it up, but I think there will be more. There are so many POD options now, and POD author-publishers can sell their books through any channel a traditional author can sell through. I was particularly concerned about your figures on Smashwords because if you look at the top seller list, it's dominated by romance novels. There are a few non-fiction books, but they're more the exception than the rule.