Maybe, but I would be equally impressed just if someone could tell the difference at all, let alone tell you which one was better. I think this might be what the OP meant, since it has been worded vaguely.
In any case, if you can't say which is better (as many people who believe in burn-in are trying to claim they can), you shouldn't be wasting electricity letting them run by themselves.
OP, the answer to your question is no, no one ever has. Learn your lesson here and stop wasting your time reading arguments involving people who don't know what scientific method is. Subjectivist on this site is just another word for 'I don't care what anyone says, what any data says, I hear it and you better believe me.' The more you learn about audio, the more you'll realise it's really not that expensive/tedious, and it's basically been figured out. The problem is people think audiophile means working really hard for good sound quality, and they're trying desperately to live up to it in an age where it's been made incredibly accessible. 30 years ago you just had to own a lot of records and be really interested in music and artististic philosophy to be an audiophile. In my opinion that's what it should still be. Look at this site and laugh. There's over 20 forums about sound equipment, and companies sponored to sell sound equipment, and if you scroll for a really long time, all the way to the bottom there is one about music. That says something about the difference between the demand for people who want to talk about music, and the demand for people who want to talk about equipment. If this were an audiophile community, I would think there'd be a forum for every general genre
I tell you this to save you time since you seem like an open minded person with healthy skepticism, and if you look for data to support the jargon thrown around here, you're going to spend a year like I did not finding it.