It would be interesting to see how these numbers compare with apps that were not as prominently featured or not as well-known as Evernote. Clearly the numbers would not be as high, but I'm wondering if some of the percentages would be consistent.
My big takeaway from the article was that the Mac store is a solid marketing/discovery vehicle for applications and a decent way to pick up some new users.
Is the success of the Mac App Store reproducible on Windows? I don't see Microsoft coming up with a successful solution and its hard for a third party to navigate the Windows version jungle.