Anything but Average
If studies show that the majority of people consider themselves above average, then one must understand the individual.
For example, an artist would likely think of her artistic skills and consider how compared to the majority of people she is quite the talented painter. She can't fathom how some people can hardly draw a stick figure to save their lives while she can paint a portrait so realistic, you could mistake it for a photo. No doubt she is above average.
Meanwhile, the carpenter looks around at the majority of people and scratches his head at how ignorant they are. Even birds build their own nests he thinks to himself. How is it that these people must rely upon me to build their homes. He could practically build a house in his sleep, meanwhile the majority of people can barely pound a nail into the wall to hang a picture. He naturally concludes that he is indeed above average.
The gardener, busy in her garden harvesting her heirloom tomatoes, digging up carrots, and potatoes, considers how the majority of her neighbors don't even have gardens. She grows and preserves all of her produce. She is certain her neighbors would come flocking to her if ever the supermarket shelves were empty. Clearly, she is above average.
The CEO of a fortune five hundred company looks down upon the city from his lavish office. He could buy his own island if he chose to do so. Clearly his ability to make more money than the average person is an obvious sign of his superiority.
The hermit living in the woods apart from society has no need for anyone but himself. He is able to survive with out money or help from anyone. He is completely self reliant and quite certain that he is above average.
The writer, sits at her computer considering how the majority of people cannot understand why the majority of people consider themselves above average.
The answer seems oh so obvious to her, no doubt she is above average.