What's the point of this entire argument? Seriously!
If you look at a lot of "add on abilities" to the powers, they are equivalent power of stunts. For example, Incite Emotion. "At range" is fairly simple, and may not be easily transferable. But "Lasting Inspiration" adds two stress to using the power. Is that not what a stunt does to various physical, social or mental attacks?
If you *ignore* the fact that it says stunt, and relabel it as a power, or as a power up for the specific relevant power. Why does it matter? I see this entire thread as an exercise in schematics. Guys, it's just a name. If you don't like it, rename "what" it is. Does it actually matter if it's a stunt or a power, other than if it applies to a "pure mortal"? And if it does matter, why not discuss that with your group? Arguing *here* of all places feels juvenile to me and like trying to "one up" other members of the forum, which is totally not cool. Again, if you feel it's not a stunt, call it a power. Period.
Best example I've seen so far, is "Investigative Psychometry" "stunt", but I personally just call it a power up for the Psychometry power, namely because you *have* to have Psychometry first. So what *is* the point about getting all offensive about it *what* it is called?