Off-topic, but I'm looking at the site, and I see what @kingraph listed for Agility/Speed is not what I thought.
Agility - How quickly a player stops and turns, deking ability. Also affects acceleration
Speed - How quickly a player achieves top speed (acceleration)
I thought Agility was the speed at which a player accelerates from a stationary position. Then it transitions into the player's SPEED stat
Speed is how fast a player will skate after the agility acceleration (or deceleration) - so not everyone has the same top speed. The top speed of a player is the higher of the agility/speed stat
Example: Brian Leetch has 6 agility and 3 speed: This means Brian Leetch starts skating at 6 speed but then decelerates to 3 speed over time
Example: Peter Bondra has 4 agility and 6 speed: This means Peter Bondra starts skating at 4 speed but then accelerates to 6 speed over time
EDIT: Also, I think weight affects agility speed, but not speed speed. I think there is a multiplier, where 7 weight is the average. anything lighter makes you faster, and anything heavier makes you slower. So for example, Lemieux is 10 weight, 5 agility.. I think that's the equivalent of let's say 6 weight 4 agility.