atlasman does have a great point there! It is hard to see all of the patterns and it takes a good amount of focus to see outlines. If they are still, a deer probablly won' t see any of them.
The thing is, I am not being still when I am drawing back on a deer! Actually, that is a pretty good amount of movement. So, that movement might be enough to get a deers attention. If he looked my way, I would want to be in ASAT, no matter what. It does break up the outline. Like Jeff said, it is made to " mess with" a deers vision. The high contrast in shapes leads deer to focus on one particallural shade in the pattern. Lets say that they focus on a black. They will see what looks like limbs. The rest of the colors will just " fade away" , and they will just look at the black (which looks like limbs). Then, they will just stop caring and go about there business.
I did a similar thing as Matt did, I just used pictures of Predator Camo compared to pictures of Realtree camo. I used the companies pictures, which Realtree' s are set-up strictly to try and have the background identical to the camo. Well, if you think about it, you would think that Realtrees would be best. If the camo matches the background, how can it be bad? Well, the outline. Take a look at these. It will show you that the ASAT style camo does break up outlines better.
Realtree:
Predator: