It is a stretch. Over the years, I have tracked many who thought FA contacts and requests meant a probable admission… only to learn that they too were rejected. Clearly, many are also admitted who experience the same via FA. But it is in no way an early indicator.
FA and Admissions are operating on separate paths now, and you cannot gain any hints at this stage. I can see from many recent posts that a # of you are trying to do so, but USC is very experienced at this and does not offer early hints.
There used to be one such documented early hint via SDA, when they would invite admitted students early to an acting showcase, but that too has ended as best I can tell. At least it did not occur during the last two cylces.