I sniggered when I read this .
I thought that one of reasons that parents pay exorbitant fees for the privilege of sending their children to private/public schools was that the smaller classes enables pupils to receive more attention from their teachers. Maybe they need to concentrate on teaching the children the basics as well as intensively coaching them to pass exams to maintain their position in league tables.
I congratulate the head of English on his candour though - he could have easily come out with some spurious line that the education his pupils receive far exceeds that of the proletariats in the state sector. I do wonder however, that if he is the head of English, wasn't this problem evident through the course work and essays that pupils write before they embark on taking their exams?