Perhaps visiting ms, but not my site
Looking at my visitor stats for the last quarter, I see the following. 8.x 36%, 6.x (the infamous one) is in second place with 24%, third is 7.x at 20%, 9.x finally shows at 17%. I get even older stuff, with 1.75% still using 5.x, 0.25% still using 2.x, 0.1% each using 3.x and 4.x.
I did get a single visitor claiming 10.x
As to overall browser use, again over the last quarter, it's 33% IE, 25% Firefox, 19% Chrome, 5% Safari, another 4% mobile Safari, 3% Opera, and Android with 1.4%. There were some visits by Blackberry users, but well below 1%.
Looking at the OS versions, XP takes first with 31%, Win 7 at 27%, Mac OS 11%, Vista 7%, Linux 3%, iPad 2.4%, iPhone 1.6%, Android 1.5%, Blackberry 0.4%. I still get visitors running Win 98,95,ME, and about one visitor a week still running Win 3.x