Manning has looked extremely sharp so far this season. The guy has pocket presence and can make all the throws, and has really bailed the Giants out at times. He hasn't even started a full year yet, but I think he DEFINITELY looks the part.
It'll be interesting to see how Rivers does once he gets his shot(god knows when that'll be). Big Ben and Manning figure to be very good for a very long time, so the pressure's definitely gonna be on Rivers.
Keep in mind that I hate the Giants, so for me to give Manning his due actually means something. But the motherfucker has impressed me so far, unfortunately. Hopefully Sean Taylor will decapitate him when we play them.
Oh, and the only reason I think people say Manning doesn't "look the part" is because of those huge eyes and generally retarded look he always has. He looks like a half-scared, half-mentally retarded 12-year-old 24/7. But he can sure throw a football.