At least theirs is more reliable, Tom's is very Intel and Nvidia centric, and amany of their testing methods are faulty. Like why is Flight Simulator in the list of GPU benchmarks when al semi recent, midrange or better cardall cap it at the same framerate?
The reason for that is that is that Flight Sim is very CPU bound, much unlike a normal game, where graphics are more important then thousands upon thousands of physics calculations all being handled on the CPU. If it was GPU bound there would be a real difference between models of cards, resolutions used and detail settings used. Since there isn', and all crds where tested on the same machine, using the same CPU, meaning that in that case the program was CPU bound.
You will also see this kind of thing in other reviews, like the recent bad testing logic they had with SSDs in laptops.