What is PRaT

There are acronyms just about anywhere you look. If any are mysterious and you want to know what they mean, there's this Google thing that makes it very easy and you can find out in seconds; what's wrong with looking up the meaning of something? Don't expect anybody to stop using them for your convenience. 

Just more audiophile mumbo jumbo.

If people use the term PRaT a lot, they are probably a prat. I suggest the Urban Dictionary for the best reference.

Boa2 hears it as I do, often heard it as allied to transient attack vs. decay. The warmer the system the more decay increased, this may be perceived as slower.

I also believe timing issue can be easily heard with certain digital. Jitter is exactly timing issue, higher jitter causes what people describe as digititus or fatigue. Get the timing right, sound becomes more coherent, natural.

one dealer. Any time he started a system, he'd start dancing in place. 

My nephew has a toy that does that.  Very cute.

Did your dealer do some Michael Jackson moves, or something out of Pulp Fiction?