Yes and no. The wheels ability to turn impacts the cornering. So the FAB allows you to limit the amount of brake which allows the front wheels to continue to roll under braking (unless you have it really tight). Keep in mind that your differential setup will play a big part in the cornering as well. It's similar to the Losi "clicker" system in the XX-4/22-4, however slightly different. There is a 1way bearing on the drive pulley to the front belt so it's locked under acceleration.

I mainly have mine setup to have just enough front brake that the rear end stays on the ground at hard braking and to keep it from freeing up the rear too much.