[christopherdone]

I did a ten-week course in BSL (passed with full marks!) and your assessment matches up with my experience, which was that it was like exaggerated enthusiastic telling of a story. It's like miming, too. Hearing people talk with their hands, bodies, faces, reactions, energy, rhythm, speed, etc. all the time already. They get along fine in clubs with loud music thumping away. Just watch someone chatting on the phone, they still make a tonne of physical gestures. And we've seen that textual interpersonal communication (i.e. pure English syntax and grammar) is hard, it's great for technical details or (with some effort) describing stories but sucks at that.