ABS doesn't make you stop faster, it actually can lengthen the stopping distance a bit. What it does is allow you to panic brake and SIMULTANEOUSLY steer around/away from danger, because every time it lets off the brakes, you regain some traction. A skilled driver withour ABS will out stop an average driver with ABS, all else being equal.
One note: IF you have ABS, and need to stop NOW, jam that brakE pedal with all your might. I mean put both feet on it and stand the hell up. Why? Finessing ABS brakes in a panic stop situation will not extract 100% of the brakes performance, you will fall far short. Again, the purpose of ABS is to allow traction while braking, so as to be able to steer and avoid hitting something, NOT shorten shopping distances. If you don't engage ABS, and steer away from disaster, you will probably come out the loser.
Non-ABS brakes are the opposite. You better not stand on them in a panic, as you'll lock up and slide in the direction of your travel, ie into whatever made you jam on the brakes in the first place. YOu need to finesse them, and if you can, you will be able to outstop a P5 with ABS. You just won't be able to steer around danger while outstopping it.
My Impreza had ABS...and it sucked. It triggered WAY too easily, it's a known Subie problem. My P5 doesn't have ABS, but they are WAYYY better stoppers than my Subaru ever was. I cant wait to get the AS tires off, and some sticky summers on. And some EBC Reds. And new rotors. Maybe stainless brake lines. Motul fluid. YOu know...
MOD BUG! GET AWAY FROM ME!