Give the post above, I decided to re-test the timing. I've got some clarification, and an apology. I'm not sure when, how, or why we recorded 2-3 seconds start time after selecting "Play Movie" from the usual K screen, but that is not the case based on what I just tested here. It is in my notes, but it is not correct. I just tested two methods, 1. New (non-imported) BR disc (Harry Potter), and 2. Already imported Lord of the Rings (LOTR) Fellowship...
I first timed the playback on the Sony and Denon BR players, from Harry Potter disc inserted, to the time the FBI warning appeared on screen. These were 42 and 39 seconds, respectively. I then did the same with Potter in the M500, and got 16 seconds to the K OSD "disc in tray" screen, and an additional 22 seconds after selecting "Play Disc" (note: the "Play Movie" option was not available) before seeing content on screen.
I then placed the LOTR BR in the M500 tray (interestingly, the system knows when a disc has already been imported and does not bring up the usual "disc in tray, what do you want to do prompt," in fact, inserting the disc does nothing on screen). If you want to work the disc in the tray, you have to select "disc" from the horizontal menu in the K menu system.
Sorry to diverge, back to the timing. After inserting the physical disc in the tray, selecting "play movie" from the LOTR metadata page resulted in a 21 second delay before the movie started. Still better than other BR Players, but NOT the 2-3 seconds I reported earlier. Still not sure why that was inaccurate, and I do apologize for the incorrect timing. I'm going to check several other movies I looked at for timing to see if perhaps one of those was somehow much faster.
Given this finding, perhaps THIS is what K is trying to improve, but I'm not sure.
Jim