It has been two years since your son unsuccessfully applied to BS and I still lurk. Son is doing well at a public exam school within a school something like this http://www.nshoremag.com/August-2013/Haverhills-Classical-Academy/
When we applied to BS we found CC as one of the few sources of information readily available. There is even less on public exam schools. I still turn to this forum for info on the things he is doing in school as there is some similarity. Also some great parenting perspectives that help bring clarity to both how I and my son react to school issues.