Excellent point — but something we will never know.
Of course, he would have had the first draw.
OTOH, I remember the shooting at the Luby's cafeteria several years ago. There was a lady who normally carried, but for some reason didn't that day -- reached into her purse and remembered that her pistol was at home. She had a clear field of fire, plenty of time, and probably could have reduced the death toll from the 20 or so.