Microsoft released a Blog post today called: IE9 Top Browser on Windows 7 and Other Highlights from 2011
To get the numbers out-of-the-way, Microsoft predicts that Internet Explorer 9 will land, by year-end, at the 25.6% mark on Windows 7 globally. That puts it well within striking distance to overtake Internet Explorer 8 as the top browser on Windows 7.
As usual, Internet Explorer 9′s numbers are stronger in the United States than abroad. The browser controls over 30% of Windows 7 market share in the US, essentially tied with Internet Explorer 8, and is set to overtake it in days.