schools I am not about to turn this into a private versus state discussion, honest: but I do believe that many traditional private schools educate differently. Like just about everyone, I have good friends in that sector and my observations have been:
The DCs are hand selected to be amenable to certain, narrow learning styles- I don't mean that in a bad way at all, I just mean the schools know it's more cost effective to 'exclude' via exam/test/observation DC who might need a wider or wildly different teaching style to learn stuff.
The DCs very often fall within a narrow pre-determined intelligence range, often an 'above average' one, so one size can fit all that bit more easily.
They very quickly learn exactly what is expected from them and get the hell on with their 1-2 hours 'prep' every night without a fuss as the school and their parents, as the bill payers, brook no nonsense. It is the way it is.
They favour shortish periods of intense pressure followed by longer periods off, and examine in a more pressured way: IGCSEs for example, actual sit-down exams at the end of every year, if not term; no modules or course-work.
Their holidays are often quite structured, not necessarily spent sitting in front of a telly. There'll be a tennis camp, a week at a PGL centre, a week away with the Fortescues at their darling cottage in Bordeaux, a week with the grandparents exploring the acre of garden, 2 weeks in a villa on an Greek island. Yes, yes, I generalise (!) but the point I am making is that many if not most private school going DC have been taught to handle long days, greater pressure and longer holidays than state school kids. They are taught to turn on and turn off as necessary.