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http://www.w3schools.com/browsers/browsers_stats.asp W3Schools sees IE below 50% since September 2008. However, it's not representative.

But as they say on their page: "Anyway, our data [...] clearly shows the long and medium-term trends."

Also, W3Schools is most visited by web developers, who by nature want to burn IE at the stake.

The most objective measure we could get is if someone from Google released their Browser/OS data.