User blog comment:IamJakuhoRaikoben/Chapter 388: Erza vs. Minerva, Review./@comment-5303512-20140613080707/@comment-7418318-20140613124249

Maybe.

It would certainly make more sense to me if Erza's speech was hitting something that was already there inside Minerva's mind and heart rather than the speech being the sole reason for Minerva making a 180° turn at a moment's notice.