As far as I know, the new Platinum series by Corsair (XMS 3000 Plat, XMS 3200C2 Plat, etc.) are based on the new Winbond 5ns memory as opposed to the former modules based on the Samsung 6ns (I think that was what they used to use).
I *believe* that is the case and that would explain why the new Corsair memory has so many people raving about it.
I could be wrong though. I'll be getting a module for myself in a week or so, so I'll let you know on that. Regardless, these modules are rated for PC3200 by Corsair and *that* is enough for me at CAS2.