hold your hand fully outstretched in front of you, at waist height, palm down, penny on the back of your hand. when you are ready, just reach for your gun and let the penny drop. if you can beat the coin to a 1 handed hip point shot, you are fairly fast. Just dryfiring, no accuracy, here, no reaction time, either.
if you can drop the coin, get your pistol up to eye level, both hands on it, and beat the coin to the ground, you're truly fast.
if you can put the coin on the back of your weak side hand, drop it, use that hand to clear a t shirt out of the way, and beat the coin with your concealed draw, you're as fast as me.
I wear a belt gun at the navel, trigger guard at belt level. I can't always beat the coin, and I start with the coin hand very close to my belly. 
if you can drop the coin, get your pistol up to eye level, both hands on it, and beat the coin to the ground, you're truly fast.
if you can put the coin on the back of your weak side hand, drop it, use that hand to clear a t shirt out of the way, and beat the coin with your concealed draw, you're as fast as me.

