http://gs.statcounter.com/os-market-share/desktop/united-states-of-america http://gs.statcounter.com/os-market-share/desktop/united-sta... Seems to suggest tha

http://gs.statcounter.com/os-market-share/desktop/united-states-of-america http://gs.statcounter.com/os-market-share/desktop/united-sta... Seems to suggest that ~70% of the US still uses Windows as their primary desktop environment, so you might have a very particular selection bias.