Quality mode in all current Nvidia Drivers = Ballanced mode. Which Clamps several texture stages to Bilinear Filtering, Cuts out some Blend stages etc..
this shows you know nothing about nv30 AF modes.
bashing doom3 and special path shows you have some kind of jealous problem.
in your mind, everything is primarily 90 degree? even outside the graphics world? lol no wonder you need an ati card muhahahahahaha.
by the way, quality mode = application mode.