Marshall's new criteria for what a "stop" is.
1) All examples are single bullet wounds to the torso
2) The BG was unable to return fire
3) If the BG began running away they made it no further than 10 feet.
I'll take those results even with the multitude of variables. The goal is to keep the other guy from shooting at you. Yes, there are problems with street results but they do give you a general idea of what works well on the street. Take these results and ballistics results done in gelatin, barrier tests, etc., and compare them to your criteria for selecting a particular load. Then choose what works for you. Bottom line, be confident in what you use and make sure it works in your gun.
I'm sorry to have mocked the water jugs, it is good fun, but I do not believe I would base my selection of defense ammo on it.