I agree that most non-tech people are much more concerned about form factor. I recently tried to explain to a colleague why a MacBook Pro is faster than a MacBook with the same topline specs - his eyes glazed over after about four seconds, and he said he just 'liked the look' of the black MacBook better. You have to hand it to their marketing guys - the greatest illustration of their success is that they've persuaded teenage girls to care at all.
Very accurate comment - and for Apple this is not a bad thing. They have managed to create brilliant products, and even more brilliant marketing. Their greatest insight is that for a lot of users a computer is just another gadget, and they realise that consmuer electronics are sold on looks and lifestyle - not on technical spec. The real genius, of course, is to tie everything together so that the teenage girls will have to own both the iphone, the ipod, the macbook, and whatever else they come up with.
The market is huge - there are a lot more teenage girls out there than there are hackers...