I think that VW 11 alltogether is generally a very slow program, compared with some others I have tried ie AutoCad, Solidworks, Inventor. I even had better speed with AutoCad on an old 1.6G PC with 3Ds Max and 700 Megs of RAM doing similar CPU intensive tasks.
I have been using VW with a G5 Dual 1.8 Macintosh system, and I just upgraded to a G5 Dual 2.5 Mac, both with around 2 Gigs of RAM. I honestly cannot say that I see a huge speed improvement between both of the Macs.
I also have VW 11 running on the same PC as I used to use with the old AC system. Some things I found were actually faster on the PC (like selecting tons of polygons).
I totally love VW and the features, and the interface. The speed on all my machines is substandard for a CAD machine in my opinion.
This is especially noted when my G5s blisters through Photoshop files, Cinema 4D renderings. Everything I bought both of my Pro Macs for works absolutely fantastic except for VW.
I dont think this is just a silly Mac vs PC competition either. I think everyone is complaining right across the board on all platforms.
I have no other metaphor for the program except that it feels like VW totally constipated, no matter how fast a machine you have.