1. He's from Pittsburgh, played QB at West Viriginia and has spent the majority of his time coaching in PA and the colonial states outside his stint at Alabama with Saban. Looks like most of his JMU roster is from the DMV and surrounding areas with a fair amount of FL kids. There's a fair amount of talent on JMU that has the potential to follow him which isn't uncommon in this climate.
2. There's currently three coaches on his staff that all have IU ties; Pat Kuntz DL coach (Roncalli/ND/IU GA 16-18), Bryant Haines DC/LB coach (Ball State grad and former position coach at IU), and Marcus Hall-Oliver DB coach/recruiting coordinator (IU position coach under Allen). Expect most if not all those guys to follow him as they will all be receiving major pay raises.
He resurrected that Indiana-Pennsylvania program that his father once built, went 14-9 in two seasons at Elon as they were coming off 8 consecutive losing seasons, and then obviously inherited a strong JMU program that he transitioned into FBS going 8-3, 11-1 the last two seasons. Think you're selling his resume a little short. Recruited Phillip Rivers and Russell Wilson to NC State during his time as their QB coach and responsible for recruiting guys like Mark Ingram, Julio Jones, Donta Hightower, etc to Alabama.