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So why do so many apple owners laim there machines are quicker? >>
I think this is best termed by the press who call it the "Steve Job's reality distortion field" (tm). Why do so many Apple fans claim their machines are higher performance than x86 machines? Because Steve Jobs told them so.
Interplatform benchmarking is tough. There are a lot of variables and it's been pretty much impossible to get anyone to agree on what is a good benchmark. Photoshop is not a terrible benchmark if you are buying a computer to run that one program, but to compare the relative strengths and weaknesses of an entire platform, it's pretty limited.
I like SPEC - SpecInt and SpecFP. They are easily available
here, people get to use their own compilers and the best hardware available in their systems, and it's somewhat regulated. Yes, people optimize their compilers to run it, but they are both huge programs and it's argueable that any compiler optimizations that substantially benefit SpecFP (for example) will improve overall system performance. I agree that the suite isn't perfect, but I personally think it's the best interplatform benchmark for general system performance that currently exists.
PowerPC SPEC results are pretty gruesome compared to PC's. Even most Mac sites agree with this - see this link
here to a MacEvolution page. One thing to note is that Motorola and IBM aren't really updating their SPEC scores - especially since people are now using the Spec2000 suite. This is usually a bad sign. When a company starts to score too badly in a benchmark, they usually stop publishing results for that benchmark. But the graph at the MacEvolution site - and similar ones at other sites - pretty much tell the story. Check the results at
www.spec.org.