I also have to come to Hot Soccermom's defense. I love the show, and his delivery makes even the corny jokes work. As Eric points out, I think for the most part he does let the guests do their thing and takes a support role, which is a good thing for a host to do.
Actually, though, one of my favorite Comedy Death Ray moments was when PFT as Danny Glover gave a vague answer to 'how old are you now, Danny?', and Scott commented that 'you'd think you would have wiki'ed yourself before you called in'.