Yeah, I can hear that plainly. Seemed to me that was just the continuation of the tradition being developed after the war by the likes of Ammons, Jacquet, Cobb, Quebec and many other Soul Jazz musicians. WBD was part of that tradition. In other words, it wasn't a specific organ thing. Which is what I thought I was looking for.
But it implies that Smith, on the other hand, wasn't originally part of the Soul Jazz tradition but part of the Bebop tradition, though he later moved solidly into Soul Jazz, which was changing anyway under pressure from Scott/Davis and McDuff/Jackson. And if that's right, it means that the real question isn't pre- or post-Smith, but pre-Scott, as chewy suggested.
Chewy, what do you reckon are the key Scott/Davis recordings?
MG