This doesn't mean he is a narcissist. And if he is a young teen, they can still have a lot of strong narcissistic traits which is why they don't really test for that age group.

Quite honestly, often it's our educational system that instills this behavior. Who got the highest test score, who is getting higher grades, who's the best athlete etc., etc., So in all honesty this who is superior and who is inferior to me tends to actually be imprinted in how we educate sadly.