Also: the issue for any network is that your 5k people will likely differ significantly from my 5k (or whatever the right number is). Extend that over an entire user population and now Metcalfe's Law takes hold, but in reverse.
"Urban" seems like a pretty fair term for teenaged/young adult hip-hop and related culture people, which does include more black people than the general population. However, a black 40 year old college cs professor or engineering professional is more likely to be on facebook (or linkedin, or researchgate, or hn) than twitter, so it's not really a racial thing, it's cultural, which is probably more tied to age and interests than anything else.
Really? What race was implied? The OP attributed mass market/middle school/urban ghetto with intelligence, which subsequently is correlative.
Not sure how race was ever implied here...
I live in the inner city. I'm white. My apartment is in an urban area, meaning I'm surrounded more by buildings than well-manicured streets and houses. I live in an urban environment. And we have people of all shapes, sizes and colors here.
When I lived in L.A. (North Hollywood, specifically), it was the same thing - urban (meaning, "of or pertaining to a city," look it up), but much more run-down. Not a lot of black people. More hispanics and white people. Myself included.
Communication depends on a common language to make it work. Just because you've decided that a common word means something different than its etymology - or its definition, even - doesn't make it so.
I'm not sure if you're being willfully obtuse or you actually have been living under a rock all your life and thus never heard the ubiquitous use of "urban" as code for "minority," but suffice it to say, the person you're responding to probably did not single-handedly plant all of the references to the phenomenon that exist in the world. Look it up: http://www.urbandictionary.com/define.php?term=urban
The fact that you can neither grasp the concept of a connotation nor fathom the idea of a word being used euphemistically does not make its real-world usage go away.
hahahehe... you probably picked the worst example of a rapper's fans being primarily black. That or Mos Def :p