To be fair, this works for any social group. Think about it.

We should also note that even if you break people down into stereotypical roles, and assume that a certain grouping of different stereotypes makes up a microcosm of society, once you look into any group made up of one singular stereotype, you can see find a reflection of that same microcosm. Which means that yes, there are nerdy athletes and athletic nerds. (Of course, that means that there are also nerdy nerds, but what can you do about that?).