100% fresh on Rotten Tomatoes (!), though they didn't include Stephanie Zacharek from Salon, who didn't like it (she's like Roger Ebert in that she's a brilliant critic, but will occasionally muff a painfully obvious call, so I'm guessing the chorus is right on this one). Several of the reviewers reference Chaplin in describing the quality of the humor, and many of them say it's Pixar's best film ever. A better animated movie than Finding Nemo and The Incredibles? Wow.
I'm actually pretty excited about this movie.