Maybe I am getting confused here, and maybe some over-zealous arguments from both sides are confusing matters, but surely individual perception of sound is NOT the issue when talking about double blind trial. I mean, if somebody can hear the difference, they can still hear the difference during a blind trial (as long as it is of sufficient length... etc...). If they can only hear a difference when they know what the difference they are "supposed to hear" is (I.e., they can see which gear they are listening to) then they can't really hear it.
I can see an advantage of being subjective, and if you are a live-and-let-live, hear-and-let-hear sort of camp, good on you. But talking about individual differences in perception, and individual differences in the ability to hear differences between certain sounds is fairly meaningless surely. DBT wouldn't really help that be investigated, more that if people are claiming to hear huge differences, DBT would show if they really were hearing them, and not being fooled into hearing them.
I think the problem has stemmed from people who have been listening to gear for along while, and get rankled when somebody tells them they are fooling themselves and there is no difference. Then because the debate starts in am argumentative way, it stays in that mindset, and the clear value of a useful tool is lost in the process.
Having mocking descriptions for the DBT-allowed forum is just a continuation of this divide between subjective and objective. But then again, maybe that's just me, as a scientist, getting a little upset that a very good scientific test (DBT) is being treated by certain members of both camps as something it is not. It is not a tool that could prove once and for all that cables really do make a difference, nor vice versa, and nor is it particularly limited or flawed. If somebody genuinely needs a month with a blind testing rig, to decide whether A or B is better, then that's fine, but if so, the difference must be a very subtle one. However some claims being made are about a new cable being a night-day difference. If so, then a DBT would show whether this difference is really heard or imagined.
As I see it, I am very much in favour of testing out things in a more scientific and objective manner, as if I found out that I couldn't tell the difference between my cheap and my expensive gear, I'd sell all the expensive gear, and if I found out I could tell the difference, all is well and good.