I am loving how all of you have made the assumption that Cam is going to start Game #1 as "now a fact".
Rivera has done or said nothing that can lead you to this conclusion.
I, for one, can say that I would not be surprised if it went either way. Good thing is that we will know the answer in less than 7 days.
Cam may not have proved anything at the NFL level as of right now, but Jimmy has proven something... That he is not currently capable of being a starting QB.
I also don't believe the decision will take anywhere near 7 days. I would say we will know by Saturday or Sunday, but it may become apparant in the 2nd quarter tonight when Jimmy sharts his pants during a Miami blitz. The reason Rivera wants to name the starter after this game is so that they can treat Preseason Game #3 as a live game with an entire week of preparation starting on Monday... The only way to prepare all week is to name the starter sometime this weekend.
I will gladly eat crow if I am wrong, but using the context clues... I believe the harder decision will be who will be backing up Mr. Newton.