Yeah, I think Guru3D was bought by NVIDIA a few years ago...
But in all seriousness, even looking at other reviews around the net, you'll find that there isn't much difference among the high end cards, especially once they're put into multi-GPU setups. That's why I've been saying for awhile that 5850CF is the way to go, and anything else shows such a diminishing return on investment I'd call it a waste of money. Will GTX 480 SLI get you faster performance than 5850CF? Yes. Is it much different? No, and certainly not $500 different in my eyes. This rings especially true once you throw overclocking into the picture. For example, in a lot of benchmarks my overclocked to 900/1250 trade blows with a GTX 480 SLI setup. Yes, you can overclock the GTX 480's too, but then I could push my 5850's more as well. In the end, the GTX 480's only end up being 10-15% faster for a lot more money.
Now there are niche reasons for getting some higher end hardware (GTX 470 for CUDA development, 5870 2GB for Eyefinity goodness, etc.), but overall the cards of the high-end segment don't do enough to differentiate themselves.
My $0.02.