Why? What has Cam done to earn respect? Why would RG3 be obligated to do so?
It would be one thing if he said "Nah, Cam is awful, I want to be compared to Rodgers."
He didn't. He just omitted Cam and said who he would like to be compared to. What has Cam done to warrant respect from competitors enough to be mentioned and complimented?
Oh I don't know other than just completing one of the greatest rookie seasons of all time... Cam is the new standard by which all rookie QB's are measured, I think that deserves some respect.
Beyond that it's just a professional courtesey... it's the classy thing to do.