+1.

Re: "bracing yourself against the handlebars," I'm not really sure what that means, but it seems it would tend to move your weight forward, which is exactly the opposite of what you want to do. (You also want a light touch on the bars to preserve your ability to steer.)

At high speed you want your weight back anyway because you're more stable with your weight over the non-turning wheel. That goes double for under braking: as far back as you can sit.

#1 rule is that even though your front brake provides at least 75% of your braking power, it's a Very Bad Habit to rely on it exclusively. Weight back (to give you rear traction when your weight starts to shift forward and to avoid a rear-wheel skid as well as avoiding a stoppie), hard on the rear brake, gradually squeezing the front brake to a hard application.

- Lucky faceplant survivor, still practicing...