I am taller than average and a thinner than average, I’ve also got all my own teeth and hair which is way above average.
I’m average in the group I ride out with and I ride a non average (make of) roadie and my mtbs are also non average too (although by current trends one of them is becoming “more” average)
So if you apply the law of averages I’m not quite “average”
In terms of bike riding ability and with a total novice at one end of the scale and top pro riders at the other end, I imagine the curve would be a normal distribution with most of us in a band a few % either side of the top of the curve.
Which says that most Americans and Europeans rate themselves “above average” on a wide range of of measures.
It also says that this phenomenon is weaker in many asian countries and may not exist in Japan, and it puts forward the idea that this may be due to the influence of Buddhism.