I have to step in here a bit on the comment, I believe a foot brake racer is a racer who does not want to spend more money on his program in the trans area, ie, a trans brake, and I believe it is not totally a function of electronics. It only releases a valve that stops the fluid flow in forward and reverse(on some trans's that is) and it instantly flows once the button is released. If you have ever ran a brake, you would find that your consistancy would be much better, but then again, I don't foot brake race and many are good at this, now delay boxes, those are electronics for sure, just my 2 cents worth.
John