Although…
If we take one of the key Chicago figures, Muddy Waters who was only four years younger than Johnson and lived in the Mississippi delta region:
The great Delta blues musicians-Charley Patton, Son House, Tommy Johnson and, especially in Waters' case, the brilliant, tortured Robert Johnson-sang with a naked force, majesty and total conviction that make their music timeless and universal in its power to touch and move us deeply.
Growing to manhood there, in the very heart of the region that had spawned this magnificent music, Waters was drawn early to its stark, telling, expressive power. He had been working as a farm laborer for several years when at thirteen he took up the harmonica, the instrument on which many blues performers first master the music's rudiments. Four years later he made the switch to guitar. "You see, I was digging Son House and Robert Johnson." The two were the undisputed masters of the region's characteristic "bottleneck" style of guitar accompaniment. With this technique the Delta bluesman could utilize the guitar as a perfect extension of his voice, the sliding bottleneck matching the dips, slurs, sliding notes and all the tonal ambiguity of the voice as it is used in singing the blues.
http://www.muddywaters.com/bio.html
If we take one of the key Chicago figures, Muddy Waters who was only four years younger than Johnson and lived in the Mississippi delta region:
The great Delta blues musicians-Charley Patton, Son House, Tommy Johnson and, especially in Waters' case, the brilliant, tortured Robert Johnson-sang with a naked force, majesty and total conviction that make their music timeless and universal in its power to touch and move us deeply.
Growing to manhood there, in the very heart of the region that had spawned this magnificent music, Waters was drawn early to its stark, telling, expressive power. He had been working as a farm laborer for several years when at thirteen he took up the harmonica, the instrument on which many blues performers first master the music's rudiments. Four years later he made the switch to guitar. "You see, I was digging Son House and Robert Johnson." The two were the undisputed masters of the region's characteristic "bottleneck" style of guitar accompaniment. With this technique the Delta bluesman could utilize the guitar as a perfect extension of his voice, the sliding bottleneck matching the dips, slurs, sliding notes and all the tonal ambiguity of the voice as it is used in singing the blues.
http://www.muddywaters.com/bio.html



