DD recently got a place at Highgate and she has also applied to HBS and will hear back in March. Her predicted grades are quite good around 6 or 7 9s, 2 8s (because some of her teachers refuse to predict nines as they think the grade boundaries may vary a lot) and 1 7 (which she plans to raise to an 8 by the time she does her mocks). She is quite academic and thrives off pressure. We want her to go to a school with a stimulating environment with passionate teachers. We were wondering if HBS has class sizes that are too big as we have heard that about the school. She is not sure which school to pick and we were wondering what your experiences of these two schools are?