It would seem to me that there are two discernments going on here, one of Katy and one of the word. The discernment of Katy is that she evidently is not in the Christian camp; that can change in the twinkling of an eye, but that would be true of all who are not in the Christian camp. The discernment of the word is something different, however. The word may have been confirmed in two ways, one being that it was repeated to her by someone who did not know she had received the word, and the other being that the performance indeed went off without any injury to her, as the word intimated. Beyond that, the word itself did not proclaim anything that contradicts Scripture. The only method of discernment remaining would be the testimony of the Holy Spirit within us, which is a completely different tack than the one this thread's conversation is taking.
Until she is in the camp, well, she us outside the camp. Until she returns home her words mean nothing
She grew up in it; she's now on indefinite Leave of Absence. I do hope she comes back, because although she would indeed face a media crucifixion, she could also lead many to redemption, along with continuing her career with gospel music.