Mu Mastery Zapp: Travel time on a nonexistant projectile?

[Vanden]

Zapp from the Mu Mastery pool has a delay on the damage being applied to the target that gets longer the farther you are from the target. It seems to be behaving like the FX for a power fires a projectile that the damage needs to sync up with, but there is no projectile; the power is an arc of electricity that, visually, makes contact with the target as soon as it goes off.