I have no idea either. Not sure I should derail this thread with more Cook, but he has the smoothness, and body language that cannot be taught. I was watching Jim Kelly footage from Miami U, and noticed right away his smoothness, and when I later saw Cook, he had a similar smoothness. So I have looked for it in old footage of guys like Marino, Kelly etc. I'm not claiming he will match them, but he has that level of smoothness.
Look at the play fake at 1:06....Kevin Hogan will NEVER know that feeling of effortlessness, never move that well.