I haven't been able to get either of my therapists to see this distinction -- I've always provided what I thought was logic-based (very pointed) evidence (sometimes to the extent of including dates, times, exact words said and so on) and still been either told it's transference (although the facts weren't completely denied by the therapists) or given some random other reason (that in current T's case currently seems to keep changing session to session).

I'd hope though that mine's an isolated experience and more therapists are able to pick apart the one from the other.