So bigger, usually faster and heavier so you are saying that the 40 S&W can provide an edge over the 9mm in capable hands?
What? No that's not what I'm saying at all. It usually ISN'T faster is what I said.
Know the status of your weapon
Keep your muzzle oriented so that no one will be hurt if the firearm discharges
Keep your finger off the trigger until you have an adequate sight picture
Maintain situational awareness