Quote from ForexForex:
You might be getting his interview styles mixed up. He (Colbert) has his gag interviews when he is F***in around, then he does his main interview at the end of the show.
It's the last interview that show Colbert's talent and knowledge of the subject, usually a book and author. He needs a 1 hour show, not 1/2 hour.
-----
KTS is quite dense and likely doesn't understand the concept of a gag interview for the sake of comedy.
Judging by his comments in this thread, I'm pretty sure he uses Jon Stewart as his primary news source.