Macworld Magazine just
put online a test of the three G5 models made in their labs. They've been compared to dual 1.42 GHz and single 1 GHz G4s in such areas as videos, gaming, 3D etc.
As a final result the dual 1.42 GHz G4 performs quite much as the 1.8 G5 and is superior i every field to the 1.6 GHz. This is not suprising though as many of the tested softwares will make use of dual-processing.
And without surprise, the 2 GHz G5 is more powerful than any other configurations. A pity it has still not shipped to resellers'...