I think one of the roadblocks to this debate, is that its a reluctant debate. In fact, its not really a debate. Its an argument.
On one hand you have a group of people who seem pretty well convinced that cables make a difference. To the point that it's just accepted in their peer group, its not really a debate at all among them in conversation. So why should they come up with a test to prove what most of them already have come to accept based on observation only? If they weren't called (ph)ools or deluded, there wouldn't be a debate at all. Its more a debate about their motives, they already believe cables sound different. If they didn't encounter the naysayers, they'd be happy campers.
On the other side, you have a group of people who seem bent on proving the first group wrong. They don't really seem all that interested in whether or not there's a difference or not. They may say they do, but I don't get the feeling that they really do. They've already concluded that there is none, and they simply seem to want to make group one look foolish. If they cared more about finding "The truth" they'd have at least tried some of the cables already. Few of these people have. There's no real curiosity. They may feign it. But they already believe they're absolutely right, no question.
So the debate comes less down to whether cables make a difference, and more about do people have a right to listen to whatever they want. One group doesn't think they do. They believe the entire audio world should be ruled by their objective rules. Subjectivity, in general, seems to bother these people a great deal. So everything has to be debated...but its not a debate to learn the truth. Its to bring the other side to their point of view.
Because of this, I highly doubt you'll ever witness a really intense test to find out. The cable believers are far enough along in convincing themselves, that you get the kind of test you have here. Not convincing enough for the naysayers. But convincing enough for those who already believe. They're really just having fun, as I doubt they're out to prove much.
The other tests you see are the type that have a forgone conclusion, from the naysayers, to prove somebody wrong. The conclusion of these tests is known before they start, or its biased into them. Like the "all amps sound the same*" test.
*They all sound the same if I run one of the amps through an EQ to sound exactly like the other, because we're only testing amp topology not really sound but you didn't get that from the title because its way down here in the fine print. And when I'm called out on it I will whine and say it was a testing anomaly when I wasn't allowed to EQ and somebody got all the "guesses" right. But please use the words "all amps sound the same" in forums, even if they obviously don't.