If there's one prospect in the 2013 class who is going to frustrate opposing defenses to the point that they're biting clean through their mouth protectors, it's Matt Alviti, a Northwestern commit.
Alviti isn't physically imposing, whatsoever, at 6'0" (see: not actually six feet tall) and about 170 pounds (this will rise as he participates in college strength and conditioning). He can move in and out of the pocket pretty well, but you can find guys who can do that in D-II. And his arm strength isn't going to knock any of his receiver's cleats off.
But the kid just makes plays—over and over and over. His change of direction is stellar, which is going to keep defenders off-balance in both pass pursuit and in the open field. His mechanics are rock-solid, which means his passes go exactly where they're supposed to be. He keeps his eyes up on his scrambles, which means if someone comes open, he'll know.
But what we love most about Alviti is his footwork.
He can throw on a rollout effectively because he throws off the proper foot. If he's rolling left, he gets his feet re-set then throws. There's no jitteriness in the pocket, no short-arming throws (something that's downright endemic in Big Ten dual-threat QBs these days) and no breakdown of mechanics if he feels rushed. His throws are solid every single time.
That's poise. That's intelligence. That's what drives opposing defenses crazy.
That's what's going to make Alviti one of the Big Ten's best quarterbacks.