Well this is how they got the numbers
Testing Methodology
We tested all of the cards using the latest GPU drivers and using the benchmark utility. The benchmark utility only gives out a score rating at the end and doesn't share the actual performance so we used FrameView to capture the performance from the 178 second run of the benchmark while running at the Ultra preset with Ultra AA and Ultra Ray Traced Shadows. Once we had the results from 3 runs, after discarding an initial burner run for loading purposes, we took the average of average frame rates as well as the 99th percentile results from the run. We report our performance metrics as average frames per second and have moved away from the 1% and .1% reporting and are now using the 99th percentile. For those uncertain of what the 99th percentile is, representing is easily explained as showing only 1 frame out of 100 is slower than this frame rate. Put another way, 99% of the frames will achieve at least this frame rate.