I noticed on that map that the Jacksonville/Duval County is another hot area and Richt and company doing well there.
"Another added bonus specific to Miami — but applicable to teams near major recruiting hotbeds such as Atlanta, Houston, Dallas, New Orleans, South Georgia, Los Angeles, or Washington, D.C., to name a few — in recruiting local players is the quality of those players, regardless of “star ranking”
"Manny Diaz...Some schools down here, they’re so talented, they may have 4 starters in the secondary who all go D1. So they may they may have a guy who didn’t even start his junior year, as crazy as that sounds, who may be an amazing player! And that’s why South Florida players have always been underrated"