Just to take issue with something that was said earlier, Catholic education IS private education. The legislation in Australia regarding education is that RE cannot be taught at any state school as a discrete subject so you won't find a RC school or a CofE state one. Any religious school is a private school. What differs is the scale of their fees and the support structures put in place by the management of the school. Scotch College have a very high reputation as a place fo academic excellence but they also have the highest fees of any school in Adelaide. However, I have done some teaching, even if only relief teaching, in both state and private schools. I really like Aberfoyle Park High and Reynella East High. I like some of the private schools and I have heard and good and bad about state and private schools in Adelaide.
One of the things that I have heard about the HC R12 school is that it was too slow in responding to the influx of students from the UK and allowed situations to develop such as an us vs them mentality