adywan said:

So younger George knew that the audience didn't need to hear what he was thinking to understand the scene. I'm really surprised that this comment made it onto the Blu-Ray, unless adding the No's was a last minute decision when everything else was finished.

Young George knew a LOT of things that his current incarnation seems to have totally forgotten or completely disregarded. I wouldn't be surprised if adding the "no's" was a last minute decision; the sound bytes themselves are nothing more than alternate takes of JEJ's "NOOO" for ROTS that they had lying around. Doesn't take a lot of thought or effort to plaster those into a classic scene to mess it up.