That I very much doubt. UltraSPARCs have been slower than
even middle
of the road PCs for years now.
Doubt it all you want, I'm running dozens of them in
production, my friend. There's more to computer performance
than processor clock speed.
It probably depends on what you're doing. At the place I work all the
unix machines have been replaced because PCs were found to be faster.
I've never found an application where a workstation can beat a decent
Xeon, and they certainly rarely do in benchmarks, but I can believe
they
exist.
Of-course for multi-processing they're much better, and built to a high
standard.