In reply to the best dancer.

It is dead commercially. Your logic is flawed. Youre comparing pop artist at the tail end of their careers, and new pop artist just breaking through to high profile, highly promoted R&B veterans who also had the advantage of huge urban radio smash hits! The fact that Ciara, Brandy, Kelly Rowland, Mary J Blige, Chrisette Michelle ,Fantasia or any R&B artist you chose to mention cant put up decent first week numbers while smashing Urban Radio says it all. There simply is NO R and B artist (who doesnt dabble in pop or dance music) that sells more than 300k over the life of the project. Jennifer Hudson on TV all day long in commercials and she can't sell an urban album. Even Beyonce's 4 turned out to be the least commercially relevant album of her career.
It's time to realize that R & b is no longer the dominant form of music. 60k is about the best case scenario these days.