I'm very happy that at DHS CBP, I don't have to support IE<10 anymore as of a short while ago. It's announcements like these from major names in the industry that help us convince IT folks in the fed to drop support for the old and busted and upgrade to the new hotness...
Still have to have stuff working for IE 7 and below (<0.7%) though pretty degraded. But for us IE8 is still at 8%, only losing to IE10 with 11%. At least FF has more than IE (39% to 24%)