Reviews are out, cards are out. Not had time to do in depth read yet but looking interesting, faster at gaming for older/lower resolution than the 480, which might be more advantageous looking forwards.
Not so sure about crunching but power is lower at least.
The MSRP cards (£239) were available when I looked around 14:30 and in the time it took me to look around at reviews, they were sold out at 14:45. Someone out there wants them! Or maybe there weren't that many... still, that'll be a fanboy argument for another forum.