I'd like to see some benchmarks of recent WINE against Windows. Windows XP would probably be the most reasonable given that it's WINE's default target.

I'm considering buying a GeForce 9600 GT to play GTA4 on, but I don't want a Windows machine, so if WINE causes a 50% hit I will just buy a PS3.

Besides, it would be interesting to see how WINE compares to Windows these days.