are we playing Robert Johnson too fast?

"This is a Steady Rolling Man, whose tempos and tonalities are much like those of other Delta bluesmen. Full-speed Johnson always struck me as a disembodied sound -- befitting his wraith-like persona, the reticent, drifting youth, barely more than a boy, that Don Law spoke of: the Rimbaud of the blues. Johnson slowed down sounds to me like the person in the recently discovered studio portrait: a big-boned man, self-assured and worldly-wise. It works for me, but listen for yourself."