I got his point, I just think he's wrong.
He says Google shifting from trying to compete from Blackberry/Microsoft to competing with Apple was basically an act of war, so Apple is justified in fighting back in the ad market.
I think that's wrong for three reasons - first, Google didn't go after Apple, they're building things people want. Their devices resemble Apple's more than Blackberry's because Apple is also doing what people want, whereas Blackberry isn't.
Second, it wasn't an act of war/betrayal/attack/breach of the Apple/Google business relationship (which Gruber implies).
Third, Apple are kind of being pricks pulling the rug out from a company after Google acquires them. They can do that because it's their business, but it's not justified as some sort of retaliatory measure. It is justified as business if they want, it's kind of prick-ish, but it's their right to do.
So, I understood, I just thought some of his points were wrong. I agree with him about not having comments on his site though - except in rare instances with a carefully built commenting community, comments become just noise and take away from a site. I like Gruber and have learned some really good stuff from him. I'm just not with him on this one.