I agree, I think it was just a way to separate Perry's criticism of Cain's plan from Cain himself. Cain is personally highly likable and popular with Republicans whether they support him as their candidate or not.
Perry's handlers were probably trying to figure out a way to make sure that Perry's criticism was seen to be only on policy and not the person, else it could backfire, hence addressing Cain in a personally friendly way while slamming his plan.
But it was dumb and completely tone-deaf. Someone made the comment that Perry seems to think he is running for president of Texas. Any support he has outside of Texas is in spite of, and not because of, these little mannerisms like this addressing Cain as "brother".
Perry would make a good President if elected..he is just rough around the edges and was frankly wrong on a few conservative issues(although he is not as bad as some conservatives claim either). The all out assault on him has been over the top too. I know the man..I’m from Texas and voted for him every single time...lol! I’m thinking Cain(although he seems a little over his head as well) or Gingrich at this point.
I still pine for Sarah to change her mind and run or perhaps Paul Ryan to get in!