Well, in real life you always have a gradient (or, more usually, a normal distribution) - actually it would be interesting to understand what the actual distribution is and how it changes with time.

It would! I'd be very interested in seeing the shape and outliers. Like, are there some folk who actually see improvements? Or who don't see any brain reprogramming at all? Do different methods of interacting with these systems have the same reprogramming effect? etc etc