Didn't read the article, but here's my 2-bits on the issue:
Apple has been riding the pop-culture wave, well past their welcome. The iMac started bringing them back to life, but the iPod really shot them to stardom. They've still managed to do quite well with this, especially with the advent of the iPhone, but what we're starting to see now is the beginning of a revolution.
Apple is starting to let their products suffer a little bit. And by that, I mean they are dragging out the timeline between updates, creating hardware designs that are faulty, they don't listen to the customer base concerning desires of design, and their customer service, which has historically been the best, has seen an increase in complaints.
Add to that their head honcho. Steve Jobs, a visionary to be sure, has always pushed off the faults of their products on others, usually the developers or the customers. They have largely been overlooked for this by their loyal fan-base, however, that doesn't fly in the mainstream. That's ignoring his comments, which scare creators, that desktop computing is dead.
There's also all of the lawsuits they pursue, or have been pursued against. This creates the image, no longer of the hippy, tree-hugging computer hacker favorite, but of the evil corporate giant.
Personally, the only apple products I like are their PC line. OSX rocks my socks, and they provide a good interface. However, I do see the tide turning in a way I don't necessarily like, and apple as a company does many things I don't agree with, as does their eccentric head. I've found myself using more and more linux products in my daily life.