MY 910D3 WINS!
Went out to hit the new M1 yesterday to see what the stink was about and to see if they were as good as everyone keeps saying. While I was impressed at how the M1 felt swing wise, I was still consistently longer with better dispersion using my 910. Keep in mind BOTH clubs were fitted to me (hit a few with M1 to get right club for me) but I just couldn't get much out of the M1 at all as I averaged 260 - 270 as compared to 285 ish with my 910. Looks like it will stay in the bag for another season! (Or two, or three....)