Could be both. ICJS is objectively one of the worst head coaches of the past 30+ years — he had a 0.133 record, took a bad team and made it worse, and failed to show any improvement after 3 seasons.
On the other hand, CAG took that team, tuned it up with transfers, and looks to have completely overhauled the culture and attitude of the football program. With any luck, after today CAG will have exceeded the win total of the entire CJS tenure midway through his first year.