(Lore?)A bit confused by the Speed and some Stats lore setting thought

Yep, I have plans to cut that at least in half since it is out of line. Also you might want to read FMS: Frequently Made Suggestions - #7 by kevin.granade
In short, one set of unreasonable game features doesn’t justify other sets of unrealistic features. More likely than not, your “justification” is what’s out of line and what needs to be changed.

No, because we aren’t linking dexterity to running speed.