How often a user get credits on climateprediction.net work?

Donavan: I guess this phenomenon depends very much on the project. It is true that SETI favours Intels, especially the models with a large cache. But in Einstein, for example, any halfway decent AMD wipes the floor with its Intel equivalent (the Intel mobile architectures do okay, though, or better than ordinary Pentiums in any case) and Macs are worst off. It depends on the science app; certain code does better with certain CPU architectures. Therefore some of the optimized apps, but with those, you really have to know what you\'re doing or you\'re risking stability issues aswell.
FYI: I\'ve got a 3500+ and I\'m more than content with its CPDN performance, so, don\'t worry about that ;-)