The 2014 Digital Book World survey found that among 9,200 authors surveyed, those that had been traditionally published were moving in number to self-publishing.
The authors felt their experiences with publishers were less than anticipated, and so felt the publishers had underperformed with their books. This might of course be a case of authors who don’t understand the industry expecting too much of any company that offers marketing services but is more likely due to a number of factors like lack of creative control, the long production schedule, and the short shelf life publishers are willing to offer.
For those who turned to self-publishing, only about 16% regretted their decision and decided to return to traditional publishers. For the rest, the trade-off they made in lack of distribution and marketing support was made up for in other ways…including the amount of royalties they gained.