He must be good, not only can he read a monologue, he can read it multiple times.
Seriously, though, the only thing of Leno's I'm going to miss is Headlines. What sucks is he's a really funny guy, just not on the Tonight Show, and I'm afraid that that's going to happen to Conan. Letterman seems to maintain quality in the 11:30 slot (though, like Conan, not everyone likes his style) and he had Conan's job before he went there, so I'll hope for the best, and try to catch as many Late Nights I can in the final year.