Comment by pascalmemories

Looks exactly like driving competency. Over 93% of US drivers self-rate their driving as above average (even significantly above average). It's very frightening to see that 36% rate themselves as above average drivers whilst sending text messages.

There's even a name for it, Illusory Superiority https://en.wikipedia.org/wiki/Illusory_superiority

edit: added some of the latest figures from the Wikipedia article.