The Quake games probably never exposed any driver bugs, because they were the games the driver authors used to decide which code paths to test, optimize, and (in some cases) even which bits of the driver to actually write in the first place. I wouldn't be so quick to infer anything either way, from the fact they never crashed ;)
(I used to have a PowerVR PCX2. Its OpenGL driver did exactly what Quake II needed - and absolutely nothing else. As I recall, they didn't even bother to get the OpenGL screen savers working. I believe the Voodoo GL drivers "worked" along similar lines.)
(I used to have a PowerVR PCX2. Its OpenGL driver did exactly what Quake II needed - and absolutely nothing else. As I recall, they didn't even bother to get the OpenGL screen savers working. I believe the Voodoo GL drivers "worked" along similar lines.)