PRAT: For years I wondered what the devil folks were dreaming about with this term. It's hardly something you can put your finger on IMO. But, having perfect pitch, some tables would drive me crazy - nearly all those with servo circuits, and many belt drive. But Linn was one of the few that sounded speed stable. Then I started measuring them all. Huge differences in speed stability, like 100x from best to worst. And Linn is one of the very best.
My guess is that the PRAT they are referring to is their sensation of speed stablity they get from Linn.
Some folks don't seem to notice pitch instability at all.
I still hate the term, like I hate all "undefined, insider lingo" that cliques tend to use....usually to make individuals seem "in the know", and to elevate themselves above others that don't use the lingo, I believe.