Just to veer slightly off topic a little, the great thing about the music of that period from the Memphis/Detroit axis was that the musicians and composers came from all backgrounds, musical and racial, and made wonderful music with friendship and camaraderie. Dan Penn, Eddie Hinton, Booker T, Steve Cropper, Otis Redding, and yet more, combined to make great music.

And, like HawkerL, the modern usage of the terms "soul" and "R&B" seem laughable to me as well - but that's progress for you - things move on, whether we like it or not. "C'est la vie", say the old folks...