pshhawww! you all are wrong! r o n g wrong!
according to my 'pocket ninja handbook: the handgun shooting stance, volume #23' the only correct stance to use is the 'squatting-russian-dance'. you know, you've seen the russian dancers hopping on left foot to right foot while squatted. well you do that, so that your nemesis will try to anticipate your moving left or right and will miss because you just hop in one place. (volume #49 goes into the proper method of actually moving to confuse your nemesis)
this stance keeps your body in fluid motion, so in the rare chance you do get hit, your body will be able to absorb the shock more naturally, allowing you time to finish shooting before falling to the ground dead. its a move i'm just about through mastering.