[archon]

All I can offer is another anecdote, not a more recent study, but in the self-defense courses I've taken over the past couple years, my instructor has stressed that a shooting is always a gamble.

"The only way to ensure instantaneous incapacitation is to destroy enough important brain matter. Do you want to aim at a 2-inch square target on your opponent's fast-moving head, or do you want to take your chances aiming for center mass?"

So I don't know if this instructor is an oddball or if he represents the current popularly held wisdom, but this instructor at least acknowledges that the effects of gunshot wounds are extremely unpredictable, which lines up with that study.