I just received the 2011 sales figures for my book(s). The sales are mostly due to 'Flatline Virus' sales since "Homo Optimus' didn't get published/distributed until December, for the most part.
So, here they are in order with the results rounded to the nearest percentage:
Apple Bookstore 45%
Barnes & Noble 18%
I had suspected my sales reflected a higher percentage of sales through Apple. That channel has been good for me. My best reviews are through Apple and the sales have followed. More good news is that the sales remittances seem to be accelerating, at least by quarter. Each succeeding quarter is an increase over the prior.