Lemmings
You thought they would have learned with "Lemmings", back in the '80s. You don't gain customers by antagonizing them and telling them they're stupid. The big problem with these "hello, I'm a Mac" commercials is that they're an easy target for parodies. It's a sometimes subtle line to cross, and I'm not sure these "hello, I'm a Mac" commercials are completely on one side, but still, it's all about perception, and if it makes PC users angry, it's probably worth taking note...
One of the most to-the-point Apple commercials aired back 10 years or so ago, it was called "dinosaurs", and showed a dad struggling with DOS/Windows issues (you'd hear him mutter "command.com, autoexec.bat, config.sys, IRQ...") while promising his kid he'd be able to see dinosaurs. After a while, the kid gets up and tells the dad he's going to his friend's house. When the dad asks why, the kid replies "he's got a Mac".
What I'd like Apple to articulate in commercials is, when you buy a PC, that's what you get. When you buy a Mac, you get a Mac and a PC for the same price, what is there to think about?