I own a computer service/repair business mostly for residential customers... like geek squad, for lack of a better national example. There's lots of small businesses like me all over the US and I'm sure abroad...you get the point...
Anyway... One thing I can say for sure, is that IE8 has really changed things for Microsoft in the browser wars. It's horrible! It seriously crashes more than it gets closed normally, it is REDICULOUSLY slow, even compared to IE7! Hell... I long for the days of IE7 and when that came out it it was hard to explain to my non-technical residential customers what this new browser was...It takes SOOOO long to load, pages render slow, its just unusable.
I've never seen seen anything as bad as IE8... while FF, Opera, Chrome are all competing to make the fastest, most compliant browsers, Microsoft is STILL(?WTF?) doing it's own thing releasing a bigger, fatter, slower browser that have features that even technical people aren't asking for...
I think they've finally made the people who have no idea what a browser is to become so fed up as to say "This thing is going so slow, maybe I should try that firefox thing I heard about..."
I bet the numbers are right. I believe IE8 is THAT BAD