Sean, I have four power cables of similar design. Each of the manufacturers has insisted that their cables are accurate and measure linearly. This probably means linear using a frequency sweep. One of the manufacturers even goes so far as to quote your line : "my cables are neutral, any problems are in your system". (Actually, that cable always has some upper mids frequency brightness-aggressiveness no matter where it is placed, and others have reported the same experience with it.)
It can be said that none of the four neutral cables gives the dark-warm-slow sound that many others do, but that's the end of the similarity. They vary greatly on bass, upper mids, top end, dynamics, rhythmic pace, thinness, clarity, speed.
So how is anyone supposed to proceed here? Your statement of switching out gear in favor of accurate cabling sounds great in theory, but until 'accurate cable' has a well-defined engineering basis that correctly predicts at least most of the audible performance of cables, we will be left pretty much where we are now.
It can be said that none of the four neutral cables gives the dark-warm-slow sound that many others do, but that's the end of the similarity. They vary greatly on bass, upper mids, top end, dynamics, rhythmic pace, thinness, clarity, speed.
So how is anyone supposed to proceed here? Your statement of switching out gear in favor of accurate cabling sounds great in theory, but until 'accurate cable' has a well-defined engineering basis that correctly predicts at least most of the audible performance of cables, we will be left pretty much where we are now.