"Art Time"

What is the difference between art education and art therapy? Where does one stop and the other begin? My own experience as a potter frequently gives me the experience of being out-of-time, especially while I work on the potter's wheel. In one of the art therapy discussion groups I belong to the following conversation thread has developed. One contributor to the conversation suggests that in regard to a figure drawing class:
As things progress, if the teacher has done her job, then you enter "art time" where time seems to disappear, the model is now an object of undulating curves, infinite shading, the meeting of light and dark contrasts all of which have to be translated into the restraints of charcoal on paper. It is hardly an all right brain thing, but more a collaboration of both hemispheres of the brain in conjunction with higher and lower brain functions.

I recognize that state of being~doing, which I find is very difficult for many to describe. In that state, where Jungian Dr. Marion Woodman says, "The painting paints the painter," we seem to leave "ordinary time" which the Greeks called "chronos" and enter the time state of "kairos" which is often called sacred time, by those same Greeks... It may be a time-less state, where transformation is possible, for the strictures of reality may be loosened, by the setting aside of the reality-based ego, which for some of our patients has been formed as a limited and restrictive critical ego function.

Now I ask my readers: what is your experience of "losing time" while engaged in art (or music) making?