[ElJay]

...and, of course, Letterman leveling accusations that 60% of what O'Reilly says is crap, then admitting he doesn't watch O'Reilly.

Perhaps Letterman was talking about the accusations right there on his show? For instance, that Red/Green ban story is complete crap but O'Lielly repeated it anyway. Then he talked about "M One Six in Britain." M 1 6???? Did he actually prepare to say that?

IMHO 60% is a rather generous number.