Here is the problem with your analysis. Conservatives, libertarians, republicans, and frankly anyone who just plain likes Clint loved this message. I could watch it again and again. The only people who are stuck on the "performance" are those who hated the message. This was a huge win for Romney. It energized the base, and it brought excitement and attention that would otherwise not have been there. It looked to me like the honest comments that resonant with the average person from a guy that people like to like.