Because as BigRedV said 'Private Schools discriminate".
I guess their reasoning is she is currently behind, approx 9-12 months. She is still only 3 though so I think really who knows. But yes she will generally always be behind. Her condition is very rare and the few of other kids I can get in contact with it is 50/50 whether they stay slightly behind till an age of around 10-12 when it is no longer noticed or they can continue to learn at a slower pace and fall further and further behind their peers. Guess its a rish they are not willing to take.
And yes I am very torn on pulling DD1 out or not. I love this school FOR DD1!! It has only done great things for her. Put DD2 in the picture and I go all "I want my kids at the same school". Plus I cried when I realised DD2 won't have the option of going there and suddenly hated the school. So now what? I have no idea!!