This article seems to be talking about newer hardware and the NVIDIA binary blob driver. If you're stuck with Nouveau and an older NVIDIA card, your performance is going to be much worse than Windoze. I recently de-Windozed a P4 box running a GeForce440MX. Perfectly acceptable performance under XP became molasses-slow under Xubuntu 13 - we're talking seconds per screen refresh, and lots of visual artifacting. Newer distys and the legacy binary blob drivers that support GeForce 4 don't play nice with each other either. I ended up yanking the card and putting in a Radeon 9800SE (with 1/4 the video RAM) and even with the open-source radeon driver, performance was astronomically better - the machine was actually *useable*.