McCain was snarky, his jokes fell flat, and any time he took a shot at Obama, "that one" was able to bounce back and demonstrate why he's more presidential than McCain could ever be.
McCain is doing a great job proving to the public that he really would be Bush Part II. Some of his policies may be different and he may have a better grasp of foreign affairs, but he gives off that same vibe of the agitated, impatient old man we don't want dealing with sensitive and complex issues.