I got asked about this before, but without the context of what verse this was. The names that matter should be fairly obvious.

It is true that "supersonic" just means faster than the speed of sound, but scaling to natural lightning speed due to things like those characteristics is also a bit sketchy imo so I don't really know. Not exactly an anime knowledgeable, just asked to comment.
Personally, I'd take the statement over "displays other characteristics of lightning" especially given that electricity can travel at a lot of different speeds.