I agree, although - you have to take into account that public school s cannot refuse people, (apart from selectives as you gotta sit selective test to get in), unlike privates which can pick and choose, so given that, you would expect private schools to do better than publics as public schools have to accept all the people who have no intentio nof studying for HSC or will not gain a UAI etc
so even though they teach the most students, they also teach the most i suppose.."bottom end" students...
(No offense intended to anyone by the way..)