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This info was posted on the official forums http://us.battle.net/d3/en/forum/topic/6413174840?page=1.
I realize tht lots of people refuse to even look at XFire data, but as with tons of other struggling games, it always seems to capture the general trend. Patch 1.04 provided a reprieve but was timed shortly before GW2 which took another bite out of D3 for the short term at least.
If GW2 wasn't out, I probably would have went back to try out the changes.