I'm interested in this as we are in this situation at the moment but I'm yet to see the impact of it medium term.
What I mean is, if your child is mainly the odd one out socially, does it matter at primary? Some examples: the only non white child in a class, the only middle class child in a class or the only working class child in a middle class environment, etc etc
My child is going to be in more than one of those categories and although I try not to worry about it I am wondering if people think it will have an impact.......? Like most parents I would have much preferred a mixed environment, but unfortunately it isn't at all and I do worry about it. (It's a state school by the way, so I haven't inflicted it upon myself so to speak).