Just installed my new GTX295 and I can't say it's alot more different. Texture still is a bit slow to load from time to time and turning your view still makes you lag a bit.
There is a new issue that is a bit annoying and that is flickering (black & white or grey & white) when you have the "receiving..." screen. Hardly worth mentioning, but it's still an abnormal behaviour. Used the same settings as I did before as well as disabling V-sync. I haven't tried out the beta with the pre-render frame setting, but I'll get to that.
Just thought I'd report what the first impression of a new Nvidia card was like. Here are my settings / hardware / driver versions.