Doh, I don't know what I've been smoking. I thought the WGL drivers were faster than the 3dfx drivers. I thought I did a benchmark comparing the 2 to find that out, but I just did another one just now and the WGL drivers are MUCH slower, Sheesh!
Anyway, here are my Q3 benchmark results(demo001). I benched thrice for each driver at a custom 800x600 configuration.
WGL 81.4 82.2 82.2
3dfx 1.0.5 WHQL 88.6 88.6 88.5
3dfx 1.0.6 WHQL 90.6 91.1 91.1
The new drivers are tangibly faster, but I don't think its significant, or even noticable, in gaming situations. Of course, the speed increase is very very welcome.