With about 150 hours of use to date, either my HD800s have burned in considerably or my ears have adjusted to them considerably. While they still spotlight bad recordings quite brightly (ho ho), I don't find myself wincing nearly as much on the vocal sibilants and cymbals that initially made such a splash. (ha ha)
My pair still ping annoyingly, but I keep putting off actually sending them in for service. The thought of being without them for an extended period scares me sennsless. (hee hee)