They haven't really talked about this but if you need to jump over a ledge, or something and your mounted will your mount have the ability to jump and a jump animation? Think SE will add this to chocobos and whatever other mounts they make. It would be somewhat annoying if they couldn't jump and you had to get off your mount to get over a ledge then remount.
I know in almost every other MMO that has jump your mounts have a jump animation too.