Very interesting, but I'm also shocked. The 4890 and 4850x2 perform better than the GTX 285...in Crysis!?!
Nearly every other benchmark I have seen, the GTX 285 has performaned better than even the 4870x2 at Crysis.
I feel something is a little
Two 4870s should easily dominate a single GTX285, since two 4870s are comparable to two GTX260s.
Two 4850s or 9800GTXs should also be better than a single GTX285.
Two 4830s or two 9800GTs would perform around the same level or slightly worse than a GTX285.
The only situation where a GTX285 would perform better than 2 4850s or 2 4870s would be if Xfire wasn't enabled, and for the 4850x2 or 4870x2, if they were still using old drivers that wasn't yet supported by ATI.