This is much less of a problem with traditionally published books.
Also worth thinking on: Chris is using the medium itself to do something that would have required a traditionally published book five years ago.
I think, though, that there's a certain level of competence/editing/spelling etc that you expect from a traditionally published book.
They are traditionally published in August, in time for Christmas, and since 1966 they have had the date of the following year on the cover.
In 2008, for the first time in history, more books were self-published than those published traditionally.
But advocates say it could supplement traditionally published books and relieve some of the pressure on scholars.
Your figures as a self-pubbed author seem to be almost the reverse of my experience with a traditionally published book.
Until recently, pools results were traditionally published in most national newspapers a day or two after the Saturday on which the matches were played.
The list of the best stories of the year is traditionally published in the final issue of the year.
An ongoing series is traditionally published on a fixed schedule, typically monthly.