[redsmetz]

I think folks are making more of this than what it really was. It looks to me like McCartney knows he's joking around. I thought, when I first saw it, that it was very stilted. It's mostly bad acting on McCartney's part. But this type of humour (as they'd spell it in "jolly old, jolly old") is very much something the Beatles would get. They were huge fans of Peter Sellers and helped out the folks who formed Monty Python (I know George produced a number of their movies). It wasn't Colbert's best stuff, although when I went back and watched again prior to responding to this thread, you can see they're both amused.