They are probably invested in the nerd mythos for the promise of wealth and power, and the veneer also reduces the social tensions that would arise from other people finding out that nerd wannabes are not actually biologically superior. These strange imposters care little about working hard in order to learn, and they trade notes and cheat at every opportunity.
They are easy to identify. Look for a moderately sized group of high achievers with excellent social skills, where absolutely none of whom exhibit OCD, Aspergers, ADHD, etc, which might be a source of mutant intelligence for some true nerds. This group also rejects diversity as much as jocks. But not gay kids because that's not PC.