If you have watched Sam Bruce over the years you would know that each year he gained an extra gear. From his days at uschool to this year he had gotten a lot faster. We can expect for him to continue that jump when he gets a college program training him. Remember dorsett didn't come in running anything close to a 4.3 40. Kids improve their speed all the time at Miami. With that being said Bruce has more than enough speed and can be explosive with the ball in his hand when he gets the opportunity. People love to talk about Sam Bruce size but if you haven't noticed he is not small by any means he weighs about 185+ and he can catch a pass over anyone no matter the height of the db....
PD was in the 4.40 range as a true freshman. I want to say maybe even better.