I have absolutely no shame in admitting 'Please Save Me' is always on in my car, road OR track. I'm certainly no expert, but I've driven my car reasonably fast on track and never felt the PSM has held me back. In fact, I don't think I've ever felt it kick in either. Even with it on I've found you can still get just enough tire slip to tighten or widen the line through a corner without any sign of protest.
I agree with the author of the article, it's a good indicator that you're doing something wrong is the light is flashing at you. Same sort of thing with ABS, I'm generally braking at the point where I
may feel a click or two under my foot, but it's never in full ABS mode. That says to me I'm braking about at the limit.
I suspect the guys who turn it off are mainly ego driven, but there's nothing manly about backing your car into a barrier at 100mph.