What is interesting to note is that there was a small company that was bullied out of business recently that offered a PC made out of bog standard components but ran on OS X. As the average PC doesn't implode, hardware wise, during its technical lifespan I don't get any of that 'superiority' of a Mac. I have WinTel servers running non-stop for over 5 years that have never failed and a server is only a beefed-up PC. Just because those same components are in an Apple designed case doesn't mean they all of a sudden become 'superior'. It's the sum of all those parts plus the Apple touch that makes a Mac different.
You didn't read a word of the post you quoted, did you? If you did, you'd know that it very clearly pointed out that claiming that the same components are in Apple's cases is a very poor argument, because while many of the chipsets used are the same or similar, the way in which they are used is more efficient, and thus superior in a number of ways. Incidentally, one of the ways in which Macs have been proven superior (according to company's like Consumer's Digest, who are very respected) is in their reliability. Most of that is due to their custom designs and higher quality control than the majority of PC manufacturers.
All of these claims of Apple's quality control being so horrible are hilarious when you hear stories from PC techs, but we don't usually hear those here. I've been a Mac tech for a long time, and there are definitely problems, but the percentages are tiny for the most part. This problem with the MacBook hard drives, and the case cracking, are the most widespread in a long time, and they might affect 15% of those model computers they sold (probably less). That's significantly improved from the failure rates on some earlier computers they sold, such as the eMacs and their faulty down-converter boards (I've heard estimates of over 60% failures on those, though I doubt it was that high). It's also an anomaly in an otherwise stellar record, far better than the competition.
They handled this one poorly, yes. They should have acknowledge the issue at least a year ago. A lot of people are going to be angry because Apple is not likely to reimburse those who did the repairs themselves or had someone other than Apple do it, many of them because the Apple Stores recommended that they do it somewhere else (because the Apple replacement parts were far more expensive than off-the-shelf drives).
That doesn't imply a greater lack of quality control or a general issue with Apple computers. No company is faultless. Some just have far fewer problems than most. Apple has generally been one of those companies.
jW