As an alum of the little red schoolhouse, I have to assume you were a special admit since the CS program there, while not as prestigious as MIT's, was still world-class. And even if you're inexplicably sandbagging about your raw intellect, one thing none of our brotherhood lacked was arrogance, thus casting further suspicion to your recount.

If you were a special admit, then that should be obvious to your colleagues, and there's nothing you need to do specially since you've made a career of trying to meet expectations.