I agree with many here, while on the surface, trying to project these kids on the NFL potential seems plausible, the fact is, the college game is different and what makes a good college player is different than the NFL.
You're telling me Tim Tebow wasn't a 5-star HS recruit and one of the greatest college players to ever do it because he had no shot at being a good NFL QB? Go down the list of Heisman winners, it's a very long list of the best college football players in the country, who didn't do anything in the NFL. Charlie Ward, Danny Wuerfel, Ron Dayne, Chris Weinke, Eric Crouch, Jason White, Matt Lienhart, Reggie Bush, Troy Smith, Sam Bradford, Manziel, Mariota...
You get the point. I could buy having a portion of the equation being NFL potential, but not the basis for the ratings.