Quake is great on a 060. If you have enough memory for it (>64mb). GFX card also helps. No problems on my 4000/060.
No problems? And what resolution are you running the game in and what are your FPS? It's beneath playable according to me, with our without a GFX card.
When I ran BlitzQuake on my 060/Mediator setup it ran just as fast as the ClickBoom port on my PPC equipped A4000, and faster than any of the DOOM ports I have tried.
The ClickBoom port on your PPC? The PPC doesn't matter at all in this case since the ClickBoom version doesn't support PPC (unless there is some patch for the game, I haven't bothered).
...furthermore, Quake doesn't run faster than the Doom ports in general. You must have tried out some really lousy Doom port if that's the case. I've ran Doom ports on my B1230 that were far more playable than Quake on a 060, with or without GFX-card.