Minimus: They even demonize the word "normal."
Kneehigh: As you indicate, the diversity of personal experience certainly enables a broader view of everything, including race. GB 2.0 is more diverse background-wise than any previous version. I believe this can be seen in its allowance of the entertainment presented to the international delegates to the RCs this summer. Several videos have been posted here and elsewhere demonstrating this.
Your mention of "non vulgar black slang" reminds me of an incident I witnessed while I was at Patterson conducting the singers on the CD that was leaked (you know, the one the organization didn't sponsor). We were trying to get the vocalists to loosen up a little bit in their phrasing. One of the professionals there, who was well versed in said slang, let fly, "put some stank on it!" What I still laugh about to this day is how the white female Bethelite singers picked up on this expression and repeated it throughout the day. Diversity of experience is so key to this issue.