How would you characterize the Delta Blues style? I think of what I've heard of it as being very somber, somewhat freer in rhythm than Peidmont or Texas based Blues. I think of it as employing more single-stringed blues runs with a suggestion of chords rather than an insistent rhythmic thumb accompaniment. John Lee Hooker plays this style. I think a key element here would be isolation by the player from other styles.

Frank Hamilton