I've never seen a Mac that has run faster than its Wintel counterpart, despite the Macs' faster chip architecture. My 486/66 with 8 megs of ram runs faster than this 300 mhz machine at times. From a productivity standpoint, I don't get how people can claim that the Macintosh is a superior machine.
At my first web design job -- at a company that used to sell and service Macintosh computers -- they had Macs on all the desks. When I left a year and a half later, everyone had Dells running NT 4.0 instead; the difference in speed, stability, and price was not even close at that time. I didn't use another Mac until I bought an iBook after the second coming of Jobs and the advent of OS X.
BTW, that Mac sucks post has become something of a meme on Slashdot. It's been used to call out Java 1.4.2 fanatics, TI fanatics, SGI lava lamp fanatics, Apple laywers, Mac Mini hard drive performance, cat fanatics, Google fanatics, Amiga fanatics, Pittsburgh professors, Apple I fanatics, trolling losers, and so on.
John Gruber on Apple's Boot Camp, which lets you install Windows XP on your Mac (in beta). "You now get to choose between a computer that can only run Windows or a computer that can run both Windows and Mac OS X."