I know the movement speeds are consistent between all the races and classes...but sometimes things weird out a little.

Example, both me and the one PAL I run with are both Highlanders (opposite genders though), and during WP speed-runs there's a lot of just moving around from place to place picking up mobs. I always try to follow behind him (since I'm the heal in those and don't want to grab aggro accidentally) but sometimes I wind up in front of him...even when he's moving in a straight line and I'm zig-zagging slightly. Also, either we're both sprinting in this case, or both moving normally; I'm not counting the times I'm sprinting and he's not.

Its...weird.