He's right. My guess that once blacks as a community moves into middle class its usage will slow down a lot. It will be frowned upon. My guess. Its traditionally not been used in black middle and upper classes in any way close to the usage in the poor working class black communities.
Meanwhile, the word nigga is allowed and said on this site and there has been a minor debate on why is should or shouldn't be allowed here (although the word n1gger is rightfully banned).