I think that he really softballed that issue. There was a lot of handwaving, and I would have liked to see him tackle some of his films (like "The Aviator", which I enjoyed quite a bit) instead of just saying "He's only good when he's retarded!". This review, while highly enjoyable, had a few instances of this kind of weakish argument.
His wierdest one was how he praised Rose as having more depth to her character for some reason.
One of the reasons he cited for her depth was liking Picasso's art, when he said disliking it was used to stereotype the high class people into being dumb. But the only way we can side with her argument is because we know who Picasso is and that he's famous so that means he's good. She doesn't give much of a reason for why his art is good, no more than why the fiance gives for why it's bad. Both are equally vapid opinions, but Rose is praised by him for being artsy while the fiance is a stereotype. I'm no art critic, but I'm sure that there are people who have perfectly good reasons to dislike Picasso and there are people who like Picasso based on weak reasoning. But since we never go into either's opinion, why does Rose liking it give her depth while disliking it makes the fiance a stereotype?
Honestly, I just watched the movie as a prelude to the review and while I generally agree with most of his sentiments, I don't see why he doesn't view Rose a teenage girl that is unhappy with high society life and irresponsibly runs off with Jack for an escapist romantic fantasy.