As evidence for my prior claim, I present this article:
http://insider.espn.go.com/nfl/draft...odd&id=2809454
It seems as if he writes this under the assumption that he couldn't possibly be evalutating receivers improperly, while openly admitting that not even he can notice a difference in the way receivers seperate.
He does this because he's completely unwilling to even consider the possibility that maybe, just maybe, seperation isn't the best way to project a receiver.
Most scouts like McShay grade receivers under the assumption that the QB is staring each and every one of them down the whole time, every play. In reality, NFL QBs do this approximently never.
For sure, how a receiver plays the ball and what he does after the catch are considerably more important than what he does before it. But as long as guys like McShay are grading prospects, you are going to have the best players at the position inexplicibly fall.