What goes in the world record box obviosuly varies in different countries. This is not anyhting to do with racism, it's practicality. Presumably in American shops there is a bluegrass box, so that's where you find bluegrass. In England, there probably isnt a bluegrass box, so Alison Krause could go in there.
   In England, there is probably a box for English folk, so that goes in there. If there's isnt a box called English Folk, shove it in world music, seems fair enough. A big shop may have a whole box for African, but puts the Asian and Oceanic in World. And, with accuracy culturally(if not geographically) they often put Zimbabwe,Senegal, Ghamna etc in Africa, but Morocco goes with Turkey into World. All seems quite sensible to me. Most classification systems work Ok, as long as you dont get steamed up about the dodgy grey areas. Same with libraries. It works OK, until you start demanding by what right they put Jane Austen in one place, but Mills and Boon in another. Then it gets tricky.