@ Chris Angelini
I'm not sure why you say that Nvidia gambled on the 680 104 to the 7970 Tahiti. The 680 was launched 3 months after the 7970. Benchmarks were being seen well before launch, and I'm sure that Nvidia knew full well how its cards stacked up against the Tahiti cards. Did someone at Nvidia tell you that they gambled on the GK 104, because if not that is a pretty large speculation on your part.