HardOCP has some benchmark comparisons with the old patch at the end of the article. This allows us to evaluate their chosen benchmark spot (chasm ziggurat), with that of the default benchmark (using the numbers provided by DiogoDX previously).
At 1920x1080 with 2xSSAA, HardOCP gets 35.5 FPS with the 7970GHz, compared to 40 and 40 for the sites running the default benchmark, or a drop of about 11%. This isn't particularly surprising as HardOCP specifically looked for the most demanding part using a 7970GHz.
At the same settings, HardOCP also gets 35.5 fps with the GTX 680 using the old patch, compared to 31 and 33 for the sites running the default benchmark, or an increase in performance of about 11%. This means that in contrast to the 7970GHz, this spot is actually easier for the GTX 680 with the old patch, than the default benchmark.
In conclusion, using the spot HardOCP uses, instead of the default benchmark, provides the GTX 680 (with old patch) a total boost, relative to the 7970GHz, of 25%, which coincidently is exactly the same as the difference HardOCP shows between the 7970GHz and the GTX 680 with the new patch (35.5 FPS vs. 44.4 FPS).
So clearly there is a rather significant difference between the default benchmark and HardOCP's spot, that completely changes the rankings, but the question then is which one is more representative of actual gameplay.