I hope this isn't considered thread-jacking, but think a bit about what your actual goal is: To stay alive and unharmed.
In that context, shooting quickly and accurately is ONE part of the equation. It makes no sense to shoot someone 6 times in 3 seconds if that means you are soaking up ANY rounds in return. Even a single poor "peripheral" shot on his part, which strikes your femoral or brachial artery, is likely a death sentence. If he's out of the fight in 10 seconds, but you bleed to death over the next 90 ... that's not a "win".
My opinion is that you shoot as quickly and accurately as you can, while first moving or otherwise acting to avoid getting shot/stabbed/beaten to death in return.