From a new player's perspective, it seems like the following facts are true regarding mounts:
1) All starting racial mounts are the exact same, stat wise, they just have a different racial skin animation.
2) The Blue Tail Mount is the fastest mount.
3) Mounts are not considered viable in combat because they die too quickly. Therefore in PVP it would be far more likely to use them to escape and run, than it would ever be to use them in a fair fight.
Please confirm and feel free to add any additional points that may be useful to a new player.