It still is I think. You can't possibly use these benchmark results as a standard seeing as you need a liquid nitrogen cooling system and a seperate psu and a LOT of knowledge to get it running at those speeds. Not to mention your card would wear down pretty fast.
Those reviews use the standard, pre-defined clock speeds and pipelines and stuff... making them more accurate, seeing as not a lot of people can oc their cards.
All that aside, pure factual Mhz don't mean very much anymore (think AMD numbers compared to Intel, GP2X cpu clocks compared to PSP...). Of course, these massive numbers indicate great speed but just don't go looking purely at the bigger numbers, that's all I'm trying to say.
-edit-
Oh and I have an ATI but my next card will pretty much certainly be an nVidia