Rockabilly Or Rhythm and Blues?

I'm in the process of rating the music in my computer media jukebox program of choice in order to help make playlist selection a breeze for my podcast, RadiOblivion, in the New Year. Mo' on that in a later post, though. But I'm struck by an age-old dilemma in the life of any sound hound: Is this track Rockabilly or Rhythm and Blues?

Take this genius for example. Big Al Downing belted out pounder after pounder - one particularly savage beastie is "Down On The Farm." It's graced more Rockabilly compilations than I'm able to pin down. But my ears say "R&B belter all the way!" Take a listen fer yerself.

Question: "Down on the Farm," Rockabilly or Rhythm and Blues? Vote in the comments below, pally.