May be true but what about the 2% where it didn't. I don't think just carrying a gun with the hope of scaring someone is a very good strategy. At what point does the person produce the gun? Because if it has reached the point where someone feels the need to pull a gun things have already gotten pretty hairy.
My original point was, and it would go along with what you are saying. If you have to have a gun, have one that can truly protect you. You will get the same effect you are talking about and maybe never have to fire a shot, but in the other 2 % that you point out, you want a gun that can protect you.
Just as an added note, in many states just producing the gun is going to get you locked up. I read in at least one state, simply pointing a gun at someone is considered first degree felony assault, punishable by 10-25 years in prison. So walking around flashing a gun and threatening someone with a gun every time you get nervous is a bad idea.
So back to my original comments like a zillion posts ago. Carrying a gun is serious business and one needs to really think about if it is for them. It is not a game and as much protection as one may think it provides them, it can also get them in real trouble.
Here is an example of what I am talking about. This guy just walked around with a gun in his pocket all the time like carrying his keys. He thought nothing of it. He killed a man over nothing. I bet he wishes he had never seen or owned that gun. Not to mention the family of the man he killed for nothing. Of course we also have movie theater shooting. One guy shooting another over a man using a cell phone.
http://www.theledger.com/article/20130117/NEWS/130119399
By the way, I was not able to open your link. I assume although I was not able to read it, the study is dealing with rational people. Domestic stuff, robberies and so on. What about a psychotic or someone on drugs. There are police shooting all the time where some nut case with a knife or bat goes at the cops regardless of the fact they have like 4 cops with guns trained on them.