Do I smell a little bias in that article?
Yes, Macs have great user friendlyness, but you do give up a good deal of things to get it. OS X slows you down, much thanks to the bloating of the GUI which cannot be changed (you can skin it, but this is not very safe).
The result is one slow Mac, which is what Apple wants cause you'll buy a new one. MS and Intel played this game years back, they still do, now Apple does too.
This also kills another old-time sales argument: Macs last longer before being old. Now Macs age almost at the rate of x86 PCs, which is a truely sad thing.
Third, upgrading is poor. While Mac OS X may rule the hardware it's run on is not too great. Video cards cost much and are dumbed down from their PC selves, and there's no way you can buy another processor and just toss it in there...
User friendly is good, but it costs too much IMO.