First of all if that is a Moultire I-40 or I-60, that is not "miliseconds" between pics. I don't think it
takes more than 1 picture every 10 seconds (flash and cam have to cycle). It could be as little as 5
seconds, but it is not miliseconds.

Second, I think that more often than not, the deer hear the click of the shutter. If I can hear it from
a couple of feet away, a deer certainly can hear it from farther (especially if calm). I have some Moultrie IRs and I have pics in the night and day where the deer is a blur from the
camera spooking them.

The verdict is still out in my opinion.