If the teacher can see the direction better than you, go with that person. Someone who has set up other people along that path, or at least is giving you many different paths to choose from.
However, everything that I first experienced told me that the choir master was "wrong" because my voice was harsh and heavy, when I wanted lightness and ease. What if I had decided not to follow his lead?
A teacher is there as a sounding-board, to some extent. If they give a direction and expect you to do it, they better be prepared for the feedback they are getting in return -- that's how a teacher improves as a teacher.
What do you suppose a person can "hold to" in order to determine the difference ?
So how does one wend one's way through this minefield?
I think that if you're really in tune with your body/your intellect/your SELF, essentially, you can feel what is correct and what is not. I don't know about you, but before I got a "real" piano teacher, I just KNEW subconsciously that something was wrong in my (then) current situation - the entire reason I joined PS in the first place. I don't think a formal "education" can do this for you, per se. This is something that comes just from self-realization.
(...) but when starting with someone new, you must just release all of your inhibitions/preconceived notions that are welled up inside.
Honestly, as a teacher, this is the last thing I would expect of a student that I actually want to teach my deepest findings to. I would prefer to have somebody who knew why they were there -- to see what information I have to present to them -- and then take it home and scrutinize it for hours ! Go ahead, weigh it against past experiences, those past experiences provide essential perspective for the individual ! They don't have to just take my word for it -- and I would much prefer that they don't. They can figure out for themselves what to give up and what not to when they have the proper tools to make that kind of decision with -- that is learning and growing, imo.
I believe, ladies, that we are in complete agreement.