As it seems this article was posted by Ben Yoris
What we saw last Sunday was a pre-production board based on the TeronCX with ArticiaS and a PPC G3 CX clocked at 500 Mhz
Either he doesn't know what he is talking about or their is
a difference to the final board.
This was due to X11 and the fact that the OS doesn't activate the G3's second level cache.
Linux has been running on G3-Macs for years so i doubt that
they couldn't fix that cache-problem. Either the (IBM)-cpu is
different to the ones used in Macs or it a lousy Linux-distro.
The only resource-hungry SW i see in the pictures is Netscape,
which i have been running on a K6/233 without having any
trouble in moving windows.
Again either its a lousy kind of Linux or there is a problem
with HW.