I agree that it is highly school dependent. For my package at my current school, my expected student contribution was 8% of my annual salary at the time; my parents' expected contribution was about 7% of their salary. I had a unit loan of about 20k and then got aid for the rest of my CoA. At one of the other schools I got into, my expected contribution was about 20% of my salary and 10% of my parents' salary, plus a 30kish unit loan. So it seems pretty variable.