Get over the "OhmyGod!-a-badguy-is drawing-on-me-right-NOW" fear, and raw speed from a holster becomes just another variable. Most cops and agents will tell you that surprise draw/self defense seldom occurs, and that they most often have some warning of attack or danger. For people who carry all the time, concealment might be first priority. Hardly anyone looks at your ankles, thus concealment in that location is pretty effective. And, you can forget about it (As long as you pants hang down far enough when seated). I've tagged gun carriers for the way they fidget, shift, check their weapons on their sides, etc, when standing, sitting, etc. You can often just spot a guy touching his weapon, to see if its "telling" through his outer garment, or adjusting his garment over a possible gun, etc. Ankle carriers don't do that (they can't reach the gun to do it so easily). Sure, it's slower to draw from, but when I carry that way, I often move the gun to my pocket or waistband if I go into a more dangerous locale, or feel a bad moment coming on (after your awareness gets honed, your Conditon Yellow might cause you to go to Condition Orange or Red.) There are no rules, so if you want to discreetly take your gun out to get it more ready to use, you do it. I find that an ankle rig is GREAT while in a car; gives me better access to my gun than a hip holster, and even some cross draw or shoulder rigs, and where I live and travel, there are more possibilities of getting into a fight from a vehicle. You can always fein tying your shoe, if you want to put yourself closer to your gun, without actually trying to draw fast from an ankle rig, should a possible threat start to close on you. Also, if you are crouching down, you are a smaller target, and can fire from the supported kneeling position. I carry several different guns several different ways. An ankle rig is just another viable option for selected occasions.