After playing for 7 hours with the DS3, I cautiously decided to give the Move controls a 30min run-around, worrying that it might ruin my K/D ratio if I gave it any more time. First impressions weren't good, as I felt I needed to shift my arm around too much to rotate my POV, which ultimately made movement less responsive. In the end, I read around the net and found recommendations for this setup:
X Dead Zone =0
Y Dead Zone = 0
Cursor Sensitivity = 0
Turning Speed = 70
Aiming type = Hold
After that tweak, I played for 3 hours straight, and placed at least 2nd in each game. Far from soiling my records, it actually improved them (with my K/D up by 0.7). It's especially good for tracking running targets with SMGs and ARs, which can be a hard movement to meter out with the DS3 stick. Definitely a surprise, and if these results hold out I'll certainly be using it as my default setup.