Thanks for the link. I knew there was black Sacred Harp singing in Mississippi. According to the article there is more than I was aware of. I'm glad to see it as well, because I have a singing friend who can't get her choir director interested in music that's not black. I'll pass it along to her.

If this article is your justification for saying the black shape note tradition is stronger or more developed, I don't get it. This article is about singing in the delta, primarily African American, & emphasizes the connections in black music. An aricle about white shape note singing would show in more detail the connections with bluegrass, etc.