Well, if a client comes in a lot of distress and doesn't ask, then sure, I agree that a therapist shouldn't push this information. However, as far as I am concerned, this information should be readily available, in normal circumstances on the first session or at least whenever the client asks. A therapist's approach is important because it will lead the therapy process in a certain direction, so it's important for the client to know what s/he's in for (informed consent). This can be done by naming the approach so the client can find out more if they want to or it could be really just talking about how sessions will go.