There's a difference between being fast and quick in Boxing. Many people think if a fighter is fast then he is also quick but this isn't always the case. Being quick is having the abilty to react to the opponent. For example you need to be relatively quick to have good defense or to be an efficient counter puncher. Many fighters are fast when they deceide to intiate a punch or manuever. The young Roy Jones Jr. was fast and quick but as he got older he reaction time (quickness) slowed. Consequently he became more susceptible to opponents punches. That doesn't mean he isn't fast anymore. Even at the age of 42 when he punches he still has tremendous hand speed what has left him is the quickness. He can still intiate but cannot react like before. Take for instance Barry Sanders in football, he wasn't necessarily fast but he had unbelievable quickness and reaction instincts. In boxing the biggest stars in the game today Manny Pacquiao and Floyd Mayweather are both fast but I believe Mayweather to have a quickness advantage. Manny is explosive when he deciedes to do something in the ring but I don't see that same decesiveness when it comes to defense and counter punching. Amir Khan is another fighter who has great hand speed but is not necessarily quick. I have yet to see him counter punch much or frustrate an opponent because of his defense. I have nothing but respect for Pacquiao and Khan just merely pointing out most of their success has been predicated on being "fast" with a volume of punches not because of quickness. At the end of the day a win is a win whether you use speed, reaction, etc, etc just pointing out there's difference between being "fast" or "quick".