Ebooks making Paperbacks more prompt?

This is something I've noticed a couple of times now, but it's not yet true for very many books at all.  And for every book that publishes before the year standard, there's another that takes more than a year.  I still think that it's an interesting trend, especially if ebooks are in fact the cause.  Also, the article quotes Seattle's own Peter Aaron of Elliott Bay Book Company, the only bookstore owner quoted, which is pretty cool.