If your work expectation is to do X, but most people can't, even experienced professionals, does that mean your above average?
For example, my department hired everyone around the same time. An expectation of all of us was that we achieve a specific certification (not referenced for the sake of anonymity) within 6-12mo of being hired.
Of my coworkers, I am the only one who achieved the cert. One coworker failed the exam, the others are “still studying”. Granted, it has a 70% pass rate. So not easy, but not super difficult.
I've put it to my boss, and friends, that because I am the only one who has passed my exam, I'm technically above average. My boss thinks I'm “technically right”, but it was part of my job description, so it doesn't really do much for me as far as performance reviews.