Palmer was actually pretty slow, he just possessed the insane ability to stop without slowing down and accelerate to full speed instantly. There were a lot of players faster - few shiftier.
Teague was incredibly fast...I didn't think about him. He would have held his own in a foot race with Pierre (particularly if Pierre was about to score on a coverage he blew), but I think Pierre would have won. Murray Hill was fast...probably about like Grant. Grant is extremely fast.
From the For what its worth category...
There was a player on my HS football team named Jason ******. Jason won the state 400M and set a new state record - he ran a legit 4.4/40, but he was the second fastest on our team. The punter on our team was not a very strong academian (to put it nicely) and did not go to college. He was also the place kicker and a wide receiver...he split the uprights 7 times that season - on kickoffs. No joke. He had multiple improvised fake punts for TD, and he consistently beat Jason by 5-10 yards on a 100 yard race...he probably ran a 4.2 or under. He squatted4 450, benched around 300, and deadlifted over 500 as a 6'1 180# high school senior. He was the second biggest wasted talent I have ever seen.
The biggest waste of talent was a LB on our team - 200# 4.4 speed and 550# squat and DL, 300# bench, as a Soph. Every college in the country was watching him from the time he was an 8th grader. He dropped out of school when he turned 16, to sell weed.