I think the responses show that people have their own meanings of "exceptional" that don't tie in with the one you're proposing
@Reynard, unfortunately.
Personally I can go either way, but what I am not interested in is "I am an 18 year old farmboy with no real skills who has apparently been doing absolutely nothing of interest or relevance for the last 18 years" stuff. Like, I would hold myself as a bar - unless the PC is more interesting than (and at least as capable as) I was at the same age, I am not interested in playing them! So like, some tattooed space engineer with an attitude isn't "exceptional" by the standards you propose, but they are interesting at least.
The vast majority of games (d100 role-under systems being the main exception, interestingly) the PCs are
de facto exceptional, which seems to be reflected in the voting.