I'm of average IQ. It's a good thing that I went to schools of average ranking or else I would've been under tremendous pressure and stiil come out a C student at best.
Having said that, it's important to recognize that a good student who goes to an average school could still learn a lot and accomplish great things later.
Now the question is: Was I a good student?
A bigger question then follows: Is accomplishing great things really that important in life?