Eh yup

Everyone with an xp os will be able to play with 2GB, for Vista/Win7 you need 3GB, it's the os that is to blame :), If we'd allow you to play on high textures anyway you'd crash in the first 5 minutes.
Your wrong, I have 6 GBs of RAM and a GTX 570 on Win 7 so my RAM is capped at around 4GBS as far as the system can tell. I STILL can't use High Textures because of this problem, which I'm willing to call a bug, or an incredibly stupid decision on the devs part at this point.