Another gun forum discussion about 21 foot rule

http://www.usacarry.com/forums/general-firearm-discussion/22072-tueller-21-foot-rule-knife-wins-gun-loses-3.html

I like this comment:
"From concealed" being the operative term. When Sergeant Dennis Tueller invented the Tueller Drill, it was designed for trained police officers drawing from duty holsters on their hips, not for average citizens, most of whom have little or no training, drawing from concealment. 21 feet won't be enough for those citizens, not even close for most of them.