I sometimes think as I'm watching that Colbert is the show Letterman and his son tune into and not just because it was his CBS home. I thought Letterman would be irreplaceable, thankfully I was wrong. I doubt that Colbert could tease out of Cher, or from anyone else, 'because you're an asshole', though. Colbert is in his prime. So incredibly quick at improv it boggles the mind.