this was discussed on the forum recently. might have some good info for you. My dd is pretty much like yours. Not keen on sports, 'Why would I talk to him mum, he is a boy' (although I have told her many times that boys can make better friends to girls than girls sometimes can). Does her work and plods along nicely. I would say though, that if girls are in very much a minority, and if they fall out with each other (which they do quite often in primary school) then, having more girls around might make friendships a bit easier.
we loved the FW campus better than CHG and I am not keen on single sex education. However, we live within 5miles of CHG and 10miles of FW. Me driving her to school is not an option and I believe green bus route is not that different to either schools (I think FW will take 10min extra)
We have made our choice last night and put down CHG as our 1st choice and FW as our 2nd. viewtopic.php?f=11&t=38914