While not as funny as his 1997 movie “Waiting for Guffman,” director-writer-actor Christopher Guest’s newest mockumentary “Best in Show” is still light years ahead of most comedies these days. Rather than going for slapstick and obvious jokes, it finds humor in the offbeat charcters it presents. But unlike “Guffman,” it seems a bit more believable and is less venomous towards its subjects. For my tastes, that means it was a bit less funny. But again, that’s holding it up to some pretty high standards.