Hey we're forgetting though, that most of the students in the coaching college are probably going to end up going to a selective school (such as James Ruse) and do the HSC. So we're forgetting that the people who don't go tutoring, who have high IQ's and are doing the IB. The key word is, "don't go tutoring". Those are the geniuses - not the Ruse students, but the people who don't need tutoring... the people such as the under-aged kids (year 9's etc) doing HSC Ext-2 Maths and still whooping ass (-_-). Oh yeah, most people like these, also tend to be good at music (piano), be asian and do a billion school activities.
So "geniuses" aren't the people with super good memory who go tutoring, as someone above said. But the people who don't go tutoring, do a billion activities and still out-perform the people who do tutoring and do barely any activities (as in those school + social work).