Frustratingly it won't let me "share" it. But it contains this paragraph- which I think sums up much of the Mumsnet debate on the subject.
"The irony is that we probably have greater levels of angst than ever, yet by most reasonable measures, our schools have higher academic and behavioural standards than ever. Nearly all schools report very high levels of parental satisfaction, yet many parents are convinced that while their own school is fine, all the others are chaotic nests of feral illiterates."