I like Dave a lot more than Jay (used to like him a lot back in the '90's), but I would agree. Conan is by far funnier to me than those two. He's more bizarre and has a sense of the absurd.
Holy crap, that's a great comparison. I wonder if he (Jimmy from South Park) was based on Jay Leno?
I think Jimmy from SP wasn't necessarily based on Leno but the part of his routines where he says Have you seen this? Have you heard of this? Is a play on Leno.
Good hosts do not clap, period. Jimmy giggles too much and he claps for his guests. Jamie Pollard does it too and it bugs the hell outta me. Be classy and introduce your guest (or new coach) with a handshake, not clapping into a microphone.