As a former musician PRaT never clicked with me in home audio until a full Krell class A system with Thiel CS3.6 cycled through here. @soix , I can only relate my experiences playing in bands like this. When everyone is locked in perfect synch with tempo, perfect attack and release, volume and balance, there is an undeniable completeness to the sound of the group. No early flams, no hangover notes, no smearing of staccato passages, running musical phrasing is in lockstep to the point that every note is heard but none stand out in any way. The band speaks with one voice.
I have listened to recordings of myself with excellent musicians and always hear the original performance to some degree or another. We had a few sessions that were “tic-less” or without error for those non band / drum corps folks understanding of that word. Tic = timing error.
The combo of class A and phase coherent speakers opened my ears to the most accurate presentation of music I was intimately familiar with. No smear of any sort. With that system in place and only speakers rotated through, I became aware of crossover / driver anomalies that slowed the edges of notes, broke the synchronization of percussion with brass and slowed the output of ranges from treble on down. The music was all there, shading and dynamics etc etc, but the recordings lost that lockstep timing or unison, a Slight blurring of instrumental notes that is normally undetected. Speakers have been the bigger culprit in the change or lack of PRaT for me. Electronics and cabling can have some deleterious effects but driver and crossover implementation tend to wave a bigger flag for me when it comes to decreasing PRaT. For me full range speakers that marry woofer, mids and tweeters in phase and speed offer that sense of unity or unison