According to NetMarketShare, as of the last day of August 2011 Internet Explorer 9 has hit the 20% usage share worldwide on Windows 7.
IE9 was built to take advantage of the unique capabilities of Windows 7 and more Windows 7 users are picking IE9 as their browser of choice to get them to their favorite sites.
According to the Windows Team blog post;
Growth of IE9 on Windows 7 is really just a reflection of how the web experiences we all enjoy get better when using a browser and operating system designed to put those experiences front and center. Pinning sites like Facebook in Windows 7 is become increasingly popular among our IE9 users.
