The question ist was the renderer on the intelmac x86 native, or was it the PPC-version running in emulation. If it was the later it is quite impressive that the machine came up with that good result
I guess we are facing the same problems like back in the old 68k/PPC switch days, when an 040 quadra was actually faster then the brand new PowerMac when running old software (emulation on the first 601 machines generated about 030@25MHz Power)