old G4 system (Score 1)

On an old 450Mhz G4, with 512MB of ram, the system runs really quite well. The only speed difference I can actually feel is menu drawing. It was a bit faster using OS9 on this machine. Responsiveness also seems to depend on what apps your running. I recently opened up IE to pay some bills on sites that didn't support Mozilla (chimera), and got a little frustrated at how unresponsive it was. So, at least in my experience, things run just fine.

Alex