He hasn't let the format do shit... That was never him. He was playing a character that was nothing like the real him... Or anyone who has ever done a late night talk show. I loved the Colbert Report... It was one of the best shows on TV and far, far, far better than his version of The Late Show. He didn't change though, that was never him. Saying that it was the pressure of the show that handcuffed him is ridiculous... His real personality was not handcuffed... It's just far different from the character he played.