What is PRaT

'PRAT' is an abbreviation of a long-winded way of saying 'rhythm'. How could concepts of pace and timing not be included in the plain idea of rhythm?

I refer to my OED online:
"Rhythm: 'That feature of musical composition which depends on the systematic grouping of notes according to their duration. b. Kind of structure as determined by the arrangement of such groups.'

These audiophile acronyms, such as "PRaT," are rather irritating when encountered during reading a review of equipment, etc. Although I understand why reviewers resort to using these insider-acronyms, to save themselves time and effort to spell them out, these acronyms nonetheless represent a form of pretentious top-secret code reserved for the inner-most echelon of audio geeks. We ORDINARY people have to Google-research their meanings.

Please Remain A  Tweaker 

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.