For us it was a chouce between hone education or independent schooling. We chose independent because the children thrive in a social environment and I don;t have the temperament for home ed.
The lack of SATS and the emphasis on music, drama and sport was a big deciding factor. Also the fact that ds doesn't cope well with large groups and acheivment is seen as a cool thing.
There are certainly some "characters", teahcer speak for little monkeys in ds's class but the small class sizes with the addition of a full time TA means this does not become a problem.
As for parents, well there are lots of doctors as the school is round the corner from the local hospital but also several teachers and lots of self-employed people like builders, electricians and car maintenance type people.
Dh and I were both educated at sink state schoola and achieved well despite this. We both went into the arts though and our success was dependent on our parents paying for private music lessons.
My dd has the chouce of learning instruments, joining choirs, orchestras entering local festivals etc. Things I never had at secondary school never mind primary.