My conclusion was there were like 80 to 100 white artists named and around 10 black artists named, which I found strange. Other posters pointed out it's probably because the majority of boneyarders are older white guys and they haven't been exposed to many black artists. I'm guessing that explains most of the discrepancy because as we know most people when they think of great voices they don't usually think of mostly white guys as our greatest singers.
Before reading the thread I assumed I would be seeing names like Curtis Mayfield, Al Green, Whitney Houston, Marvin Gaye, Gladys Knight, David Ruffin, Aretha, BB King, Muddy Waters, John Lee Hooker, Bobby Womack, Anita Baker, Philip Bailey, Luther Vandross, Levi Stubbs, Dennis Edwards, Lauryn Hill, Alicia Keys, Chaka Khan, Ray Charles, Smokey, Bill Withers, Nina Simone, Michael Jackson, James Ingram, Edwin Starr, Lionel Richie, Patti Labelle, Diana Ross etc. Guys like Otis and Sam Cooke died so long ago so I could see many not being around to see them.
I would assume lack of exposure to many black artists is probably the main reason the overwhelming majority of artists named are white.