Transference are genuine feelings. However, I'm pretty sure that if these feelings have some childish qualities (longing, obsessing, hating etc) then they have their origin from childhood. Also, transferential feelings do not necessarily have to be loving or positive, they can be all sorts of.

I don't have obsessive feelings to my therapist (have had though) but I do have long lasting negative transferential feelings. Sometimes in the session I also feel positive transferential feelings (when I feel like a baby cared by him) but mostly I just hate him. When I go home then I'm not in the pull of either of those types of transferential feelings, then I just respect him as a therapist and I feel grateful that he is so patient with me.

At the same time I've discovered that I'm now able to develop transferential feelings to older men because my T is an older man. Previously I never thought anything about them, couldn't imagine that I could have anything to talk to them. Now, because I know my T, I've discovered that I'm more willing to relate to older man and I expect them to be like my T. Transference.