Dvorak has a Mac, and it seems that he likes it. I was a long time critic of the Mac as well, but I came around for much the same reason that he did:
I can see why the Mac is gaining market share, because the rationale for using one is simple. Do you want to deal with the agony of antivirus, firewall, antispyware, and other touchy software subsystems, many of which do not work well? Or do you want to boot Microsoft Word and write a document and be done with it?
That's certainly been my experience with the Mac, and it's been my wife's experience as well. To a very large extent, using a Mac is like using Smalltalk: do you want to follow the herd, or do you want to actually get something done?