In my training stances you do at the range and where you put your finger on the trigger don't matter in a gunfight. Especially with a pistol.
He isn't a sniper.
You fight like you train.
training, I deliberately place the pad of my finger on the trigger. When I ran a stress course during a training session at what was formerly known as Blackwater, I was not surprised to find that my training technique was how I 'fought' through the course of fire.