Muralman - I read Kusunoki's article and have few problems with it.
I don't understand it either. He is mixed up in my way of thinking. He forgets that we use dither to get a lot more out of LSB's (to remove quantization errors). His assumption that the LSB is the error margin in what we hear is completely fallacious. This article seems to go against conventional engineering wisdom. It is either a mishmash of rather odd assumptions or I just can't follow it.