It is unsuccessful as a primary communication method. You, yourself, have said agreed that CS was never intended as a communication mode. I have no doubt that you have witnessed successes. But it is unsuccessful as a communication mode because of it's relatively infrequent use. Likewise, to use it as a communication method is a distortion of what the system was designed to do. I can use a butter knife as a screwdriver, too, but a butter knife was never intended as a screwdriver and does not accopmplish the task as efficiently or as successfully as a screwdriver would.
And I have witnessed numerous successes with ASL.
