DD is year 10 and to get in to her schools sixth form requires 6 level 7 ,and 2 level 6 GCSE's this is equivalent to 6 A and 2 B grades on the current grading system. I think this creates unfair pressure on pupils who most probably left to their own devices i.e not have to have 'sleepless' nights would achieve.
The school has problems with some girls suffering from Anorexia , Bulimia and self harming . The school should have a more reasonable (though appropriate expectation for A or level 7 grades in just the A levels required for study).
This alone would reduce the 'fear' and concern on my own daughter. Do they want to make their own 'very' bright pupils anxious for some kind of power race with over schools !
'We have more stringent entry requirements than you ' though our girls are always afraid of not getting an A*
Secondly getting 8 A at GCSE does not always equate to 3 A at A Level similarly as demonstrated by my Nephew getting no A at GCSE (only 4 A grades) does not mean you can't get A A level he got 2A and 1 A. The 2 A were in English and Chemistry ( Chemistry Dept did not think he was up to it since he only scraped a A at GCSE)
The final point what a pupil is at 16 is not comparable to the pupil at 18 !