Close your eyes and repeat:
"He IS a dual threat,
He IS a dual threat,
He IS a dual threat."
I've seen him run three well-executed designed runs. (The 42-yarder against Stanford, of course; a QB sweep when NU loaded up right, and Vitale led left for ~20 yards against Duke; and then a reprise of that play.)
He has run the 'traditional' option poorly, running parallel to the line of scrimmage and simply pitching wider, forcing no decision from the defense. I don't recall him keeping on the read option at all, but I haven't seen every play.
He is not a Persa-Colter-Kustok-Kafka dual threat. He'll be much closer to Bacher. Running is instincts first, and I don't see it.
This is not criticism. These are my observations. Other great college quarterbacks who were not dual threats: Jameis Winston, Teddy Bridgewater, Connor Cook and, you know, most others. It's okay if he's not a running threat.