Originally Posted by Nick Cummings
Mike, biomechanically I have no idea why. Possibley due to better leverage. I am 6'3" and find the deadlift to be my strongest lift. I also train with five people over 6' two of which find the deadlift to be one of their stronger lifts. That answer might not impress you but my good friend Dave Tate says, "Many times the taller, thinner lifters are the best pullers." http://www.t-nation.com/readTopic.do?id=459744
Taller people tend to be proportionally longer limbed with only a small percentage of additional height from trunk length.
Long femurs-short trunk= sick leverage for DL, crap leverage for squat.
even dead average height guy with longish legs and arms are well suited to DL.