It would be interesting to know if the prep-school educated DCs, who go into the grammar state selective system, lose their advantage over their totally-state educated peers at some point in their secondary school careers? Anyone with any experience of this?
It would be interesting to know if the Heads at the super-selectives have any idea of the % of their pupils who have been tutored to get into their grammars. And also if there is any correlation twixt tutoring and the results the DCs come out with?
Does tutoring give primary school aged DCs a boost which has a long-term impact on their educational outcomes or not?
I think there is an enormous amount of spin (from very competitive middle-class parents) about tutoring. There is an urban myth that it's not possible to get into the super-selectives without being tutored for years. It simply isn't true if your child is naturally bright and quick-on-the-uptake. But people self-perpetuate the belief in their own DCs' interests IMHO.
Long-term, intensive tuition can however make a huge difference if your DC isn't particularly bright. One of DS's classmates (one of six in a mixed state primary which isn't top of the league tables) was always on table 3 or 4, never regarded as even vaguely clever by her classmates (although they were an exceptionally clever-for-state-school class with over 60% Level 5 or above in English and Maths at KS2). Year 3 the tuition started. She passed two of the super-selective 11+ exams and is at a s-s grammar now. But none of the parents, teachers or her peers could have seen that coming when she was in KS1.