Why don't read nobody the feature tab?
And i don't think, that they will use 2000MHz GDDR3 memory, when the GTX280 has only 950Mhz. And the new GT335 will use 4 full cluster and 1 cluster with only one vec8 unit? http://www.nvidia.com/object/product_geforce_gt_335m_us.html
Yeah the mem speeds and cluster configurations are dead giveaways that these are GT2xx GDDR5 parts. Too bad really, the blood was already in the water