Well if there is anyone who says they can tell Carr will have a break out year, I would like to hear it coming from Palmer. When it comes to QBs, Palmer knows what he is talking about.
As for the Mcnair comparison, I think he is referring more to his ability to make decisions. Mcnair used to run on almost every pass play. Every now and then you would see him make a good throw but he would be very tentive and then just make plays on athletic ability alone. Now he knows his offense and you see him being more patient. He might be saying Carr is looking more like that now.