I'm not going to take any side in this discussion, but for sure I can remember that during the Simunition FX training inside the dark rooms none of the people I trained with (including myself) had time to use the sights when things were going downhill.
On a side note I would like to mention that using the flashlight is such situation isn't exactly easy thing to accomplish either.
One day your life will flash before your eyes. Make sure its worth watching.
R.I.P Jeff (23Skidoo), Chad (CJLandry) & Mark (Okie) You all will be missed.