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I thought it was funnier than Zacharek did, but she at least doesn't burden the movie with the responsibility of carrying a clear, consistent satirical message (and how could it when it's a running series of Candid Camera moments?).
I also think Zacharek raises an important point: That so much of the comedy depends on things being a surprise. If you've heard in advance that the movie's the greatest thing ever, or if you know the setup of most of the gags, much of the fun is undercut by concern over whether expectations have been met or missed.