I wished not to confuse you before so I made the spee stat follow the general rule os Stat Ratings. The fact is that Speed and HP are the only two that actually use numbers. In fact, they use both. They follow the generalities but have numbers to go by since they aren't move related. Example:
Amby Lvl 1
HP 15~
Attack+
Defense-
Sp Atk~
Sp Def-
Speed 64
HP is self explanitory. Speed dominates the battle. If Speed gets raised or lowered, it's just like in the games. Up a stage (2 stages) adds 10 (or 20) for that particular battle and it goes away after the battle. Down a stage (or two) does the exact opposite. Believe me, it makes a difference. Also, While HP is subject to change throughout the growth of the pokemon, Speed stays the same. Any Questions? PM Me, Bri, or Glow.