Oh you swallowed that one did you?
Check this:
http://www.barefeats.com/pentium4.html
You'll note that the Apple is considerably slower than both the top of the line Pentium and Athlon in every single test apart from 1. These are all very relevent tests like Photoshop, Bryce etc - lots of graphics design packages that are supposed to be the forte of a Mac.
Before you scream G5 (which ironically the CPU is made by IBM), check these:
http://theregister.co.uk/content/39/31405.html
http://www.amdzone.com/articleview.cfm?articleid=1296&page=2
Not only did Apple cheat in their benchmarks to show the G5 as faster, but the G5 gets absolutely raped by the P4, Athlon, Xeon and Opteron in fair tests.
As for the Mac OS not being built on top of a command line OS, that's untrue aswell since OSX is based on a Unix kernel, which is very much a command line OS with a GUI over the top. In fact it ain't all that user friendly at all compared to Windows XP, but it is considerably more reliable than both Windows and the old Mac OS.