I tend to hunt funnels areas or swamp edges that allow deer to travel through.
In all my years of hunting, the heavy majority of deer are trotting or walking through and don't offer me a relaxed shot.
So the "BLAH" has worked well, however, it depends on their demeanor as they approach.
If they appear alert I become cautious as too why they are alert and wonder if it is possibly from me / scent, etc..?
Typically when I stop deer they immediately become alert, of course, and this leads me to try and shoot lower by a few inches.
This is a guess from experience and trying to compensate for them dropping down before they lunge.

Example: I had a nice 8 pointer on archery's opening evening of 2007 pass by me. He trotted through, from my right side, to behind me.
As I got position I only had 1 shooting lane cut in that direction and to stop the buck I had to bleat.
I believe because I was on a knoll and he was under me, the trajectory was steeper, which left me with a smaller aiming point for the vitals.
Unfortunately I DID not compensate for the bleating along with the steeper angle and the buck was on "HIGH" alert and he proceeded to jump my string.
I'm not sure any compensation would have mattered, as this bucks belly hit the ground during his frantic scare while he lunged.
The funny thing is, he took one 10' lunge and walked to about 40 yards as if nothing happened.
At that point he turned back in my direction and flicked his tail, which is equivalent to the middle finger, never knowing what happened, or did he??!!!

So... I marked down YES, but it could have been marked down as under certain circumstances.