Are you sure you're running it at 1200p, or 1080?
AA turned off most likely. Either way, it's not a valid comparison as the numbers still show the 5870 performs at higher numbers in a same settings, apples to apples benchmark. And for significantly less money.
You have to feel a little pain for those who recently paid a premium for a GTX295, but this is how the GPU game is played. We all know this.