Unless I'm forgetting something, wasn't Yuno's whole defense/cover-up that his abilities came from Athena, and that others still just didn't want to contract with her because of the "stray god" stigma? I know he hasn't shown his complete abilities in public yet, but I could've sworn I remembered people already knowing that he's fairly powerful now / him beating someone in a duel or something.
Seems odd that this girl's just accepting that Athena's powers are so small, when it seems like that should just naturally follow with "but wait a second, if I hardly got any abilities from my contract, then where'd you get your power from, Yuno?"