Gibon, it sounds so good and sensible....except in real life it doesn't work so easily. Wind varies- I've seen speed falling for a short time on the take off roll as variable wind changes. sometimes it pauses for a few seconds, then increases rapidly. How many false warnings will result in unnecessary rejects? For all their bells and whistles, very few bizjets have even autothrottles. I was nearly the recipient of a wild Learjet in the ribs thanks to an out of control Learjet with no autothrottle control, so no, I am not impressed with the bizjet world! Any binding brake should be detected on taxi. You just turn onto the runway and set takeoff power and release the brakes. It's an amazing formula that's worked since aviation started- don't complicate it.