I disagree completely
very applicable for the street
living in Houston with this traffic, the illegal/stupid drivers, stupid/distracted drivers, the need to emergency brake and maneuver is almost constant!!
and this smoother quicker reaction "does" and will prevent, many accidents, similar to what Ty expressed about the track.
I guess most don't know but this is decades old information and if you took the MSF course and paid attention you'd already know it. It does apply to the street but things are a bit different as you can't ride around with your fingers resting on the brake lever - And if you try you'll look like a complete newb. But thanks for the reminder of what riders should already know.
I saw the title and was thinking something else. You can ride around in congested areas with one or two fingers covering the brake if you have learned to do so. I don't do it all the time but do when I see cars or people who might cross an intersection when they shouldn't. You will only look like a newb to other newbs or squids. Experienced riders will recognize that you have developed the necessary skills to work the throttle and brake at the same time.