Then, of course, one can create a moderately diffuse tail in a smallish (not tiny) room with a lot of work (that isn't worth it for a couple of obvious reasons) but it's probably better not to have much of a tail (like I said, I'm not at all fond of LEDE), and finally, a T60 is absolutely measurable in such places unless they are too noisy, even though they are unlikely to be long, pleasant, or useful. Of course, I'd probably use T20 in most such places, but you already knew that, didn't you? Your claim to "doesn't apply" is simply evidence you don't know how to apply it as far as I'm concerned. I certainly labor under no such difficulties.