I was apparently a bright child, reading age of 12 at 5 etc, good at maths. My parents sent me to the local comp. At infants school I was supported, had extra lessons with the headmistress while the rest of the class were being drilled on their phonics. When I went up to the junior school I was consistently top, cruised through and didn't do a stroke of work.
At 10 my parents moved me to a posh-ish prep school and the shock was incredible. I had never had to work before and I was consistently bottom. I really struggled, I'd never learned how to work or learn before. It showed me the yawning chasm between the two schools.
I managed to pass my 13+ by the skin of my teeth and went on to another private school. I moved at 13 though (girls normally move at 11) and it was a difficult time to move - not only had I been the only girl in the entire U6 year at prep school I moved into a new school 3 years after everybody else joined so found it hard to make friends.
So, I learned a few things from the switch from state to private. The schooling was much better - a child has to be able to learn and apply themselves to learning. Research shows that for this generation of children they will probably change careers 3 times over their lifetime. They have to be able to be flexible and learn. It is very hard to catch up if you move late - I know a number of parents who are planning to switch from state to private at 11 - I wouldn't do this, I struggled doing it at 10.
I have done well since leaving school and I attribute this to a confidence and can-do attitude I got from my private school.
DD is at a private school (which she will be at until 18, so no nasty moving!) and already at 5 I see a difference in what she is being taught and her peers. Whether this will matter in the long run I don't know, but all the children are very confident and have every opportunity, whether it is sport, art, science etc. I hope I've made the right choice, at the moment I think I have.