Before the game Kiper had Rivers going in the 2nd or 3rd round, JP Losman the clear #3 QB.
After the game Kiper ate his crow on Rivers, said he was separating himself CLEARLY as the #3 QB so far, and said that the #3 QB will probably be drafted by Miami at pick 20.
I don't think that is indicative of Rivers' stock falling with most teams. To say that scouts could care less about the production in the actual game is a blatant falsehood. The scouts want to see what happens when the lights come on, and the QB is facing a passrush by some of the best in the country, throwing to some of the best in the country against some of the best in the country.
It wasn't like Rivers sat in the pocket all day long THEN threw the ball getting his completions that way. The teams didn't blitz you're right, they sat back in coverage and he showed amazing timing with his own players after only a week of practice with them. With the lights on Rivers was lights out. I guarantee he rose on most teams' draft boards...and I don't think you have any reason to say he fell Stamos' unless you've got some kind of inside info scouts on a bunch of teams telling you that he fell on everyone's board. He rose, but when the combine comes and goes he could fall a little again. When people get a look at Losman's cannon more closely at the combine, I think he will fall a bit.