Having worked for an IT reseller (and authorised Apple 'solutions expert') for the last two years I've seen firsthand the sort of problems most people only hear about through Slashdot et al when they hit critical mass, and on a regular basis.
Apple are capable of producing great products, but they're also capable of producing stinkers, whipping up demand and then failing to supply - for nearly two months (I've just had my Mac mini arrive mysteriously today which wasn't due until after christmas, even though it was ordered 3 weeks ago), have incompetent supply and support procedures and generally show all the hallmarks (i.e. problems) of any reasonably large IT corporation. They are by no means infallible.