Yes, we have had this discussion before. And as I said before - this is a controversial topic - one that is not worth arguing anymore.
I participated in one of those matched blind trials performed a couple of years back at the DCDIY speaker building convention. The unmistakably clear result was that
no one among some 40 speaker builders could hear any difference among capacitors of different construction used in crossovers.
Floyd E. Toole, the acknowledged expert at testing for listener preferences in audio products said it this way:
"Knowledge of the products that are being evaluated is generally understood to be a powerful source of psychological bias. In scientific tests of many kinds, even in wine tasting, considerable effort is expended to ensure the anonymity of the devices or substances being subjectively evaluated. In audio, though, things are more relaxed, and otherwise serious people persist in the belief that they can ignore such factors as price, size, brand, etc. In some of the “great debate” issues, like amplifiers, wires, and the like, there are assertions that disguising the product identity prevents listeners from hearing differences that are in the range of extremely small to inaudible. That debate shows no signs of slowing down."
Let's debate something else, like which brand of paint dries faster.