Uhh no that's false. When a QB goes to throw the ball he isn't bouncing on his toes bro, his feet are set when he is ready to pass. So how does bouncing affect Accuracy if he is planted when he throws?? That makes zero logical sense. It doesnt matter how fast the WR is running. They want them on their toes simply for timing and rhythm. The accuracy comes from their hips, proper width between the front and back leg, and the follow through. When they don't follow through or they throw off the back foot is when u see balls sailing.