Thanks Soul Stream
So it isn't, as I thought it might be, simply a matter of using different stops and using chords more (and after all, Don Patterson and Jimmy Smith both used chords a lot on ballads). What you seem to be saying is that these guys had a different concept of how you played the organ. Not, I suspect, a different concept of how you played jazz, because they were all of the same generation as the beboppers. And if you listen to Wild Bill playing "Jive samba", you know he was capable of doing the Hard Bop thing when he wanted to.
Am I following you right?
MG