What exactly is PRaT???

The type of music you're listening to matters in term of whether PRaT is relevant. I've listened to turntables that sound soft and somewhat indistinct rhythmically (typically high mass turntables), but their reproduction of the weight of orchestral music was stunningly good. For that music, I think pace and rhythm didn't matter much. On the other hand, jazz typically seems to benefit from equipment with some ability to reproduce pace and timing.

@yoyoyaya The Naim version of PRaT is easy to understand because it is focused on emphasizing the leading edge of notes while being harmonically lean. I've since found that the next level to PRaT involves music reproduction that has pace but is also harmonically full. Pass amplifiers fit that bill. I think @ghdprentice also mentioned that Audio Research is even better than Pass amplifiers at conveying both pace and tonal richness.

My short definition for PRaT: You can clearly hear how different voices and instruments are interacting together in music. This is particularly evident in jazz music as a vast generality.

FWIW, electrostatic speakers have PRaT in spades because of extremely lightweight of their moving elements. 

@immatthewj ....20' above it, 50 yards from the mudfield....slept through the night mostly, waking to heavy rain and the winds.  Nil damage.

We're on the 'wrong side of the tracks' from the Biltmore entry, west of the McDowell bridge.  Everything betwixt was a sheet of clay-colored mud water...a leaning high-tension power tower (since replaced), the entry mentioned shattered...

Power back in 2.5 weeks, water back a week later....it's nice not to have to flush with a 5 g. bucket anymore....(...surprises one how often you end up doing that...).

Feel extremely lucky, and somewhat shell-shocked in some ways...

Your city got torn into halves.  Literally.

Too many stories to tell here...

Thanks for asking. ;) J

While I understand where our friend, above, "actor, singer, stage director and audiobook narrator" is coming from, the acronym’s origins are different.

They were brilliantly marketed (perhaps coined, I don’t know) many decades ago by the owner of Linn to promote the sound of the Linn / Ittok TT + Naim amplification combo. The idea was to point to what those devices did well, excluding everything else (where they were mediocre).

The sound was somewhat mid-bass heavy, with mediocre resolution by today’s standards, but with very coherent mid-range restitution.
The overall sonic result was pleasant (my opinion - I used to have that combo).