Nvidia's OpenGL drivers are my 'gold standard', and it has been quite a while since I have had to report a problem to them, and even their brand new extensions work as documented the first time I try them. When I have a problem on an Nvidia, I assume that it is my fault. With anyone else's drivers, I assume it is their fault.
Quoted in Thomas McGuire, Creative 3D Blaster GeForce4 Ti4400 review TechSpot (2002-05-02)