Studio Artist 3.5 is not a universal binary. It runs in emulation mode on intel machines. Anything that is multi-threaded will run threaded in emulation mode on any intel machine with multiple processor cores.
For regular brush painting i find one of the original 2 GHz intel dual core imacs runs a little slower than the speed of a dual G5 tower. We also have a 3 GHz intel pro tower here and the pro tower actually smokes the dual G5 tower in the same test, running much faster than that G5 machine. This was with a test using the 'a gradient brush' preset that comes up when you first startup studio artist with a run of 400 paint strokes from the same generator start condition.
Bus speed and the performance of the graphics card factor in as much as processor speed. And since the quad G5 has 4 processors, anything that threads will split 4 ways as opposed to 2 ways on the powerbook. The quad G5 has a really fast bus so you see a lot of performance gains on that machine over a dual 2gig G5 for example. I don't have a quad G5 here so i can't compare it to a intel pro tower.
"Ok, so your PASeq preset really just is using one paint action step.
So when you go into the paint synthesizer, you can see that it's using path start regionization. The path start generator is the Watershed DM, and the Path type is Path Start…"