This reminds me of the hype just before G80 and then it actually turned to be true.

1.8GB and 2GB sounds like a lot of memory for GPUs today but NVIDIA usually pushes the capacity to new heights for a new gen, 768MB for a 8800GTX was an insane amount when it was released as well.

However one thing I can't simply believe in is the power efficiency, either the TDP is very inaccurately given as to what realworld figures would show or these numbers are just made up. As for performance, it's definitely looks a bit too positive but not totally impossible but due to the respins/delays, I'm really doubtful. If performance figures would be accurate nvidia could charge like $699 and $599 respectively unless ATI would adjust prices, that alone says a lot...