So-called "talking blues" isn't about blues progressions (oddly enough) and is about the speaking being rhythmic on the beat, as opposed to less rhythmic recitations like Luke The Drifter. Chris Bouchillon is when people began talking about rhythmic speaking as "talking blues" but the same style he did was around way before that. The little tags that e.g. Woody liked to do, that was all in "You Shall" and the like before Bouchillon recorded.