I think what people don't understand is that all races (of the same gender) run more or less the same way. However, they look different depending on how tall (or short) the character's legs are. The reason elezen running animations look so wierd is because they have really long legs, but the devs can't let them run any faster than the other races because that would give them an "unfair" advantage, which is why it seems like they are just walking really fast.