It's a long story dude, google itI do but evidently you think you know better so why don't you enlighten us on how you arrived at the conclusion of the 7970 "owning" all the NVIDIA cards in frametime latency in that techreport review?
Here is a snippet from the techreport review Crysis 3:
This last metric measures "badness"that is, time spent working on really high-latency frames. Here, the Radeon HD 7970's smaller spikes at those trouble points in the test run give it the edge. AMD's drivers and GPU combine to produce a smoother gaming experience in this case.