Not really, because when he does that, he takes quite a lot for granted, he simply does not question it, it does not occur to him that one could.
I bet in his own mind he is a middle of the road kind of guy and in NY he might be.
He could not do what Colbert does, because Colbert must actually understand conservatives and how they tick.
Having said that, and I am being dead serious, I think Jon Steward is one of the most honest and decent persons of the American media.
Unless of course you believe that anyone not agreeing with you is a partisan hack, but that would just be stupid.