Mac OS X betas suck too much resources because their code contains a huge portion of debug code, slowing the OS by a large factor. It's getting faster build by build, so this is not a reason to question the OS quality.
Moreover, what did you compare? You ran OS X and Win2000 on the same hardware?! Mac OS in any version is always optimized for Mac hardware, unlike LinuxPPC. The latter is only ported to PPC.
Mac OS X betas suck too much resources because their code contains a huge portion of debug code, slowing the OS by a large factor. It's getting faster build by build, so this is not a reason to question the OS quality.
Moreover, what did you compare? You ran OS X and Win2000 on the same hardware?! Mac OS in any version is always optimized for Mac hardware, unlike LinuxPPC. The latter is only ported to PPC.