Burn-in time Vs. Getting used to a sound


I have had much in the way of high end audio over the years. ...and the idea of an electronic item needing several hundred hours of use before sounding their best..is an accepted idea now (for the most part). Recently I have heard a growing thought of this just being the user getting used to the sound of a product.. Truthfully in the early days of Large Advents, DQ-10 Dahlquists and other gear..there was never any talk of burn-in time... Any thoughts out there on this.... Truth or Hype?
whatjd
SF: What do you do to disturb cables, other than hooking them up the opposite way?
DK: Moving the cables from their original resting position is enough to disturb the formed dielectric. However, one may not be able to hear the difference. I do hear it whenever I listen after my housekeeper was here. I doesn't take very long for the dielectric to form after the disturbance
Bought some used Red Dawn rev II Nordosts which were multiple-spades (shotgunned?) at one end. Since I have non-biwirable speakers (Verity), but have amps (Alephs) with two sets of output jacks it made perfect sense to wire 'em that way. Sure enough they sounded ragged and bright. The seller confirmed that he had used them "the other way", and Nordost suggested I'd need EXTRA break-in time to "reverse" the "orientation". Well, they were right...the cables smoothed out, developed GREAT soundstage depth, and gained LF body, after use. How much of this was my aural accomodation? I don't know, but since the cables are threaded through the floorboards to amps hung under my joists, I'm not about to reverse 'em to satisfy a single-blind test!
DK, my friend, dust bunnies don't rule here as far as the cables are concerned, since she finds it so easy to move the cables to clean/vacuum! Fortunately, she cannot move the equipment rack, amp, monitor, and speakers! Accidentally pushing buttons or such is another totally different matter! ;)