It really comes down to one simple thing. The majority of soccer players in SC (and the USA for that matter) are from white, upper-middle class (or middle class) backgrounds of which the Bishop Englands, Christ Churches, Porter-Gauds, Southside Christians, et al, cater to.
I'm hoping for the day when more lower level socio-economic kids (blacks, Hispanics, etc.) can get involved. The reason you don't see many urban (i.e. -- inner city) kids playing soccer is due to the outrageous costs associated with club, ODP, etc. Our state would be well-served to provide quality outreach to these groups to further advance the popularity of soccer. It's amazing how in every other country in the world, soccer is for the lower classes and such. It's really only in America where our infrastructure prohibits their involvement. Our lower level socio-economic urban sport happens to be basketball and the "good ole boys" opt for football/baseball.
It would be interesting to see a racial and economic profile done on the successful programs in South Carolina. I believe it's a straight case of the HAVES and HAVE-NOTS. Even in the larger public schools, those that have great programs (Wando, Irmo, Ridge View, Dorman, Chapin, Dutch Fork, Spring Valley, James Island ... I could go on) hail from affluent communities.
This is not meant to flame or incite, but I believe it to be reality!