Still not as impressive as some are making it out to be.
OC'ing both the 7970 and 680 will close the gap considerably.
Now how well this rumored Titan OCs , time will tell.
But you know darn well a 1200-1250 Tahiti will be closer to 70%.
If AMD can massage another 40% out of Tahiti, we're back where we are today.
That is only one side of the coin though. You must take the overclocking potential into consideration as it might have significantly more headroom than GK104, also GK110 has 384-bit bus which will help it more than GTX 690 at high resolutions.
I think they will clock it really low out of the box to not violate the power envelop they are targeting...
But I just don't like the price and hope it end up a rumor. otherwise my next card will be AMD too...