AS Maths

Okay guys so I've been wondering... how many kids learn Advanced Subsidiary Maths at 14? In Trinidad a lot of us do it as an Add Maths course - actually no... most of the people starting it are 15. But a few of us skipped... and landed in mathematic hell.
Okay so it's not that bad but ask a 14 year old from somewhere else to find the area under a curve and then the volume when rotated 360 degrees or to find the stationary points of a curve using differentiation. And we haven't even done Iteration or ln yet, but we've done logs... I don't know, but it doesn't seem to me that this is the normal sort of work a 14 year old is subjected to.
Take a look at this paper if you want to see (and this one is pretty easy)... GCE Core Mathematics C2 AS
Maybe it's just because I was at AS Maths lessons today but the thought just crossed my mind.
So tell me can most people my age do this??