Anecdotal Evidence: OS X Runs Much Slower On G4 Cube Than On Other Machines?

For some time now, Iive been running OS X on my G4 Cube, as well as on my PowerBook G3 "Wall Street." Iive been favorably impressed with the interface, especially the simplicity and elegance. I am not quite a Unix "Yoda" yet, but can appreciate the potential. But there has been one thing that has nagged at the back of my mind for some time -- moreso, now that I am running Mac OS X 10.0:

Why does OS X run so doggone slow on my Cube?

Before you Cube fans send those flames, hear me out first. I have the good fortune to play with OS X on a wide variety of machines: for example, at work, we have a G4 466 MHz with the standard 128 MB of RAM. OS X runs on this machine pretty much the way Iive described it above.

At home, I run it on two machines, the aforementioned PowerBook (233 MHz, 288 MB RAM) and G4 Cube (450 MHz, 30 Gig HD, 768 MB RAM). I expected it to run slow on the PowerBook, but what has really discouraged me has been the speed on my $2000 Cube, or, rather, the lack thereof.

What caused me alarm hasnit been the fact that OS X runs slower than expected on my supposedly high-end machine, but the fact that others have send The Mac Observer similar comments. The feedback makes a two-fold allegation: 1) that OS X runs unforgivably slow on the Cube and 2) OS X runs slower on the Cube than on other machines.

For example, over at Mac OS X.com, someone posted the following:

UI slow on cube
For some reason, the UI of OS X seems to run faster on my PB G3 300mhz 192mb ram than my cube 450mhz 310mb ram. This puzzles me considering that the PB has a clunky rage pro and the cube has a nice smooth rage 128... but either way i hope apple fixes this

Is this problem isolated to a few people only? Have you or havenit you experienced this as well? If you own or use a G4 Cube running OS X, weid like to year from you.