Thanks for the info. Your lead pushed me to do some digging. They are a pretty large 'suburb' of 60K. They do actually have two high schools: Colerain and Northwest (R12). While Colerain is generally extremely strong, Northwest is pretty woeful.
From the District website, it appears that they have pretty liberal open-enrollment within
the School District (form attached below).
This would lead me to believe that most of the talented players transfer to Colerain HS. Not that there is any nefarious about this, but it stands to reason that a suburb with 60K people, only 2 high schools, and open enrollment would be pretty darn strong. That is roughly the same size as Dublin School District enrollment area. If the best players from Scioto and Jerome were free to xfer to Coffman, Coffman would be every bit as dominant as Colerain, IMHO.