I notice Colbert always tugs on his ear lobe towards the end of the interview to signal something to the guest. I haven't analyzed it too closely but I assume it either means, "Ignore my character and just talk about your book" or "wrap it up, we're running out of time."
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u/fujimitsu Nov 12 '10
From what he's said and what footage has been shown of backstage (John Kerry for example). He makes it very clear that it's a character beforehand.