This talk of efficiency in context of the web is hard to swallow. Flat design usually comes with a moderate-to-high dose of minimalism which I find helps more than the residual ambiguities hurt. The comment about younger users in the conclusion: we could say the same about older users and what they're used to—older web design trends have their fair share of atrocities.See you, space cowboy.
I think it was more intended to satirize both Hollywood and Broadway. There's probably a community somewhere that got all of the inside jabs and thought the movie was hysterical in the same way that I think South Park is hysterical.