Sorry TS, let me explain that a little bit better.
They want us standing broad shoulder because, they say "You have more protection standing broad shoulder and with your chest facing your suspect, that the vest will protect you more, than if your standing at an angle."
Like with the "Weaver" they are telling us that your ribs are more vunerable to fire, because the vest are weaker on the sides and that your underarms is not fully protected from a shot.
So they do not want us to stand at an angle for this reason, so they want us to shoot "Iso" with our chest pointed toward our foe. "For protection" in the event of a shoot out.
This what they are teaching everyone that comes to the academy, troopers, opossum police, marine patrol and basic police. By the way TS we are shooting your favorite pistol of all time, the glock.
I'd perfer a sig or hk, but its what they are issuing the troopers, and as a reserve trooper thats what I'm expected to carry.