Apple has obtained a good portion of the music market in total. Offline retailers Borders and Tower Records have been surpassed in sales by iTunes.. and that’s only including the PC user base. Also, the numbers being touted around only include some digital sales and only on Windows making me question their accuracy.

Based on that I’d assume that non-US based digital music sales sites aren’t being covered by this survey. Outfits like AllofMP3.com could make a big difference in overall sales figures.