Another, even more comprehensive, report from Hugh Howey and Data Guy.
The good news: there are thousands of authors earning a living wage from writing, some of whom seldom or never appear on the bestseller lists. The bad news: this still represents a relatively small percentage of authors. But it appears that the advent of ebooks has grown the total market and made it possible for more people to make a living out of writing.
The other news: There are still reasons to pursue traditional publishing (either with the Big 5 or a small press), but, except for a very small number of authors, earning more money is no longer one of those reasons. This becomes clearer with every report they release.