I think this one is worth a thread of its own.
How do you know it's a poor recording? Because your system can't play it without some unpleasantness distracting from the music?
Back in the 90s I used to drop in on Tom Evans (Michell iso, various Groove phono stages, Eikos Cd player etc) every now and then, partly to go fishing with him but I'd always be roped in to listening to the latest itteration of whatever he was working on. One occation he had a pile of digitally mastered Zappa to hand which when played on his Mk2 Rock/DV17D2 and prototype amps into Mk2 Glastonburys sounded really harsh but the analog mastered recordings sounded great. A few weeks later, on another visit, the digitally mastered records sounded very enjoyable, the only difference was that he'd changed a couple of op amps in the preamp for a different type, he never said what they were but the harshness was undetectable now, the previous opamps had been the issue but the tendancy was to blame the recording.
Why do most rooms at a hifi show have jazz playing a lot of the time? is this because the systems make a mess of anything else but do tone well?
Who needs a system the main talent of which is telling you most of your records are rubbish recordings? It's meant to extract the music from those recordings, some systems can do this in an enjoyable manner while letting you know the recording isn't the best, some emphasise the recording aspects over the musical ones. Which is the better system?
I may be misunderstanding the post quoted in the thread title and he could mean "expose the music in a poor recording" in which case I fully agree.