Just for those others who are reading this thread, and not say planning on biomed, I would like to make the point that it will also depend on the degree/units. ROTE learning doesn't work for everything, e.g. for engineering (besides materials) you have to understand the concepts and be able to apply what you've learnt, be ready for different situations, you can't just rote learn the course, it just doesn't work that way. H1s/HD aren't that easy, depending on the unit/course, (with that being said I'm still awaiting results, but have a feeling that 2/4 units I won't get such a great score from).
A lot of people completely bomb out in Uni after doing year 12, i don't know why but I guess they just start to get lazy after such a long holiday. I'd say most work pretty hard though, because we all want a good GPA
That (as said above by russ) is probably due to the jump from VCE. Some students have had all these tutors and all this pressure from parents e.t.c for them to do well in VCE, then they get to uni, and its up to them now, they don't have tutors there to help them, they don't have the pressure behind them.
In the end, its just putting consistent work in throughout the semester that will get you there. But with that being said, different courses are easier or harder and have to be approached in different ways.