According to Language log there is a study out suggesting that Nerds, or dorkenheimers, are identified in the Californian school system because they are “too white” and avoid all the “Black” stylings of speech and dress traditionally1 affected by white teenagers. But this can’t be true. I remember distinctly when Zonker, who is Californian, was advertising a Nerdcare anti-sun lotion, and it was minty green. I’m away from the family archive CD, so I can’t find the link.
1 on the “classic” timescale — ie since about 1959