Perhaps people should be requesting a "sprint" movement mode.. a key toggle or combination of keypress + mouseclick. That way we retain the current realistic running speed that some of use appreciate while also offering a faster movement option for those seeking that.
Having said that.. your general movement speed does increase as you put points into "Speed". We could argue that increasing the default speed faster than it already is will suck some of the usefulness out of that stat. In fact, if you increase the default speed to the point where it starts looking silly (and it's already nearly there), placing points in the "Speed" stat is just going to make it look worse.