I still feel comfortable having bought an iBook yesterday
I don't even need to begin to tackle some of the poor logic in this article, or the semantics of "what makes a *nix." How about this: different people want different things out of their computing platform? Or maybe: choice is a Good Thing?
I sympathize with O'Reily because I feel like I've "done my time" in Linux. I'm getting an iBook, but I'm still the secretary of my university's Linux User Group becase I still feel that Linux has its place as an educational, embedded, and server platform. But I've done my time fighting with awkward configurations and a generally poor desktop experience. You won't find a bigger Open Source/Free Software advocate than me, but I can live with some of Apple's decisions. So they keep their Quartz display technology under wraps? They're opening their ZeroConf Rendezvous software to the world. The core of OS X is free and open. And in all honesty, most of the successful Open Source companies have to charge for something. I think Apple has been good about opening the most critical technologies, and holding on to what can make them profitable.
But here's the great thing: you have a choice. There's no need to rant because someone is suggesting that maybe experienced *nix users could/should spend a day without editing init scripts or whathaveyou. You can use your *nix of choice, and other people can use theirs.
This article is like that rabid music fan arguing why one band is simply _better_ than another; I think it's pretty clear that desktop environments, even whole operating systems, are a matter of taste, just like music. So when someone has a different preference, don't belittle them; celebrate the fact that they have a choice.