These exams are foreign to me (and justifiably so), so I proffer the most relevant exams I can: AP exams, the ACT and the SAT.
The AP exams (college level tests, for those that don't know) were a breeze. 5 is the highest score attainable and I scored 5's in AP Calculus AB and BC, US History and Spanish with little effort (especially in Spanish, which I expected to fail because I didn't do ANYTHING in that class). I got a 4 in AP Literature, which I raged so hard about because I love literature and I couldn't believe I did worse reading ENGLISH LITERATURE than reading SPANISH.
As for the SAT's and ACT's (I guess you could call them preliminary college tests so the schools know how "good" you are) I got 1850/2400 on my SAT and 31/36 on my ACT. I studied for 45 minutes maximum for the SAT, so I didn't expect to do that well (I actually did pretty fairly) and I didn't know what the fuck the ACT was like at all, and getting a 31 (the equivalent of a 2000 on the SAT) stunned me.
All in all, tests are bullshit and are hardly a measure of intelligence or college readiness here in the states: they simply measure memorization, test taking strategies and to a small extent, what you actually learned.
EDIT: The Uni finals I've taken have ranged from "what the fuck am I reading?" to "really? This is the test?"
God damn, I hate that I'm a Bio major, and have done best in Humanities. Its like becoming a cook and realizing you're only good at critiquing the food.