I'm really not sure how this works. I dove a Nomad in December that was set up with the inflator coming off the rear dump in this way . . . but the VENTING was done through a standard OPV installed where the inflator takeoff is at the TOP of the wing, and running the cord down to the left shoulder. It worked extremely well, and I actually remember thinking that putting the dump at the top like that made a great deal of sense.
Here, the orifice of the inflator, being below the diver's body, is below the entire air bladder -- unless there's a compressive effect on the wing to drive air out, I don't see how you could dump via the inflator. And if there IS a compressive effect, that seems very similar to the compressive effect of bungies on a bungied wing, and that's been decried as an unacceptable risk for a long time.
I'm sure it works, because I really can't imagine AG hawking something he hadn't even dived, but I don't understand HOW it works. And it's certainly a long step from standardized equipment.