thats why i suggested a speed level/attribute. The more you run the faster you can go, more realism and it makes you happy (well maybe not at first). Sorta like in gta, the more you run on foot the longer you can hold down the sprint button, in this case you could run faster (forever). This ould also be used along side dexterity and avoiding attacks......and maybe quests? Racing against a npc. Or perhaps an olympics style race? Who knows! lol, many possibilties.
Though I still dont think the max speed should be that fast, not faster than any other transportation
p.s. lol it would be funny to see enki\'s run on all fours to run faster =D