But I would guess they don't. TTBOMK, most of the computer RPG's took their ideas from the original pen and paper RPG systems, and I don't think many (if any) of those had a spell recovery rate affected by armour. There was a chance of arcane spell failure which increased as the spellcaster wore heavier armour, but I understand that was adapted in the computer games to forbid mages to wear anything but the lightest armour.Unless you're playing MM6 v1.0, that is ... 
Also, I'm pretty sure that speed only affects the physical attributes, not the mental ones.
