Earlier quoted context omitted.
They don't care directly - they care because it's still the same old world where techies install and configure the browser for them on their computers. Handhelds are different, but computers are just like back in the ol' days. This is how IE lost.
If that where the case, FireFox would have overtook IE.
By another stat counter, for 5 years from 2004 to 2009, Firefox raised from 2% to 20%, while IE fallen from 95% down to 67%.