Digital BW, The Print

Contrary to the hype and recommendations on this list, don't bother 
getting an Mac/Intel based dual core processor G5 if you want to run CS 
or CS2. Because these are non-Apple applications that have not been 
specifically written for this technology, they actually run slower than 
the older G5! Aperture should be OK but PS is reported to run at half 
the speed with the newer chips. Maybe this will be overcome with CS3?

http://www.pcworld.com/reviews/article/0,aid,124767,00.asp

Regards

John Malcolm