[untamedmedley]

If the goal of black and latino OKC members is to attract members of the opposite sex within their race (which is most likely the case), then it would make sense that they would communicate in their own vernacular.

That is, a black person who is otherwise educated might use a phrase that makes perfect sense to other black people (e.g. "where dey do dat at?"; often used to express confusion at someone's ridiculous behavior) but that isn't clear to the mainstream. Latinos may pepper their profiles with Spanish words.

Asians might do this too if there wasn't so much ethnic/linguistic diversity among the Asian American population. As such, they likely use "safe" mainstream wording.

All this is to say that there are reasons that have nothing to do with intelligence that could have caused this sort of result.

[xiongchiamiov]

My technical writing professor always told us to try and reduce the complexity of our writing (I think she used Flesh Kincaid). Perhaps more of us white people have had similar teachers, and took their advice to heart.*

* Unlikely, but hey, I might as well bring it up, since we're talking about flaws in the analysis.