A girl in my year got 96.8 and had EAS in. I can't remember the medical term for it but basically she had a dodgy heart, that let blood flow both ways down the valve where it should only flow one way. She was always off to sydney (from rural NSW) to get tests done, and for awhile there they were still deciding wether she need open heart surgery or not. It meant she couldn't run because of her heart (so you can imagine stress ect.) and it made her tired and sick alot of the time too.
I got 93.35 and had EAS in, for financial hardship (i've been on the full amount of youth allowence, living away from home rate for both prelim and HSC) and because of this I had to work during all my exams and assessment periods (I took time off for the actual HSC though) which classifies as excessive family responsibilities. It really does affect your study and overall state of mind. ie, you cannot buy textbooks to study from (dodgy gov't school has like NOTHING in the library!), or attend hsc lectures in sydney ect. and working makes you tired (its hard to bring yourself to do homework after working 7:30 to 6:30 in a supermarket), so you don't have as much time to study, which makes you stress and ruins your state of mind for exams... and it sucks having to make the decision between working to make money or calling in sick (to work) because there is an assesment due the next day...
I don't know anyone with a dodgy eas application... I did hear though that in big private schools a large percentage of the kids put in misadventure forms for thier trials (like, bullshit doctors certificates and stuff) because they knew the exams would bring down thier assessment mark averages... which I think is very slack... similarly, with the girl I mentioned above, I got the shits when she put in misadventure forms for the trials (she still sat them, but got the higher of her trial or av assessment mark for them), because she obviously wasn't affected by the fatigue ect. at that time, and I legitimately beat her but because of the misadventure she got a higher mark
She really was sick for the HSC exams though....