Rich Little is probably an actual better fit for this particular audience. They didn't seem to enjoy Colbert that much. I figure they should get somebody that will entertain them, even if it doesn't entertain the rest of us.
The Bored are already here. Idle hands are the devil's workshop. And no... we won't kill dolphins. But koalas are fair game.
Honestly, and this goes for any athlete in ANY country, I would question the heart of any competitor, given the work, time, training and sacrifice it takes to be on the Olympic level that WASN'T exuberant if they've just won a gold medal.