I think each case is completely different and that the decision whether or not to hug the client is based on alot of things: the t's position on touching, the client's desire or aversion to touch, past history, etc.

In my case, "not" hugging me was definitely retraumatizing. The times i needed it were when i got into such intolerable emotional pain that i could not bring myself back out. It created the same scenario i experienced as a child, where i was in intolerable pain and nobody noticed or did anything to help. My t knows this about me now and is willing to provide that comfort when i need it. I don't need it often, but when i do, i do.