Friend's Ds is at a high achieving, massively oversubscribed Comp. It now transpires that they do their GCSEs over three years, I.e. some in Y9, some in Y10 and some in Y11. She is concerned as she has heard that universities prefer students who have done their exams in one go as it shows ability to cope with a large workload. Is this true? Will her child be disadvantaged by the school policy?