Just to make sure Mao's. post doesnt confuse anyone, i would like to point out that sac marks do matter. However, it is your sac ranking that is sent to VCAA. Without a good sac mark, you wont be able to achieve a good ranking- hence sac MARKS do matter.
not without reference to the cohorts performance. otherwise it will not make any sense.
On one of the SACs last year for MM, I scored 86%. if I had a cry about it, people will say "aww, you just need to ace the exam and do better the next few SACs."
except, I was ranking far ahead, with the next person less than half my score.
even though the 86% would correspond to a B+
in fact, even if I had gotten 50% it still wouldnt matter, because i'm still ranked first.
however, in a less skewed cohort, things will more normalised.
the moral is: you want to do as well as you can, in front of everyone else. how much that takes depends on who your competitors are.