Dreamseeker, I have also been exploring my idealizing of my T and last session we talked about kids idealizing their parents. She said yes we do idealize when we are young, and we come to know the reality of the parent slowly over time, and at the appropriate time.
I think this is true with idealizing the therapist too. It seems like a natural progression and when the process works as it should, done appropriately, it may be this that 're-wires' us, gives us the 'corrective' experience to internalize and become the new and healthy Unthought Known.