There does exist, however, interesting data to suggest that the listener has a significant "break-in" period, a phenomenon that may be important in and of itself, one which should not necessarily be
ignored.
Indeed. Break-in does exist, but requires a completely different set of tools to execute properly: a large quantity of your favourite alcoholic beverage, unimpeded access to your perfectly placed comfy chair, your favorite tunes, access to a remote to adjust to the appropriate volume for each music set, lots of time.