Not trolling, this has been my experience. If you want real 3D performance, the proprietary crap is what gives it. And VDPAU is nice. There are some nuisances, with Optimus chipsets you have to use Bumblebee which is kind of annoying if you don't want to burn through your laptop battery in minutes, and AFAIK the driver still doesn't support XRandR 1.something (1.2, I think?), that would allow to alter multiple monitor settings from the settings of my DE instead of using nvidia-settings.
Having said that, I've pretty much given up PC gaming so I don't really need 3D anymore. Intel is just fine for a compositing desktop.