And now take the opportunity to sit back, the holidays after year 12 are just brilliant.
If anyone falls short of what they would have preferred, then look at it how you want but also take it for what it's worth. Best thing about finishing the HSC is you can look at it with perspective - obviously when you're doing it there's no amount of "it doesn't really matter" advice that will help, but whether it's now or in a few years you get to see what everyone was talking about.
For the record I fell about 5 points short of first preference, but got in Biomed Science and pretty much started with a clean slate. Nobody in the course cared about high school marks. Now we've all finished and gone on quite different paths - some went to Medicine, some went straight to jobs, some decided on other postgraduate courses and I'm personally considering accepting an offer to do a PhD, something I never thought I would four years ago. The only thought that's given to high school is this time each year when it's all through the papers.
Just roll with it and get pissed.