Update. More on MJ from people who used to work with him.
http://news.ycombinator.com/item?id=685603
And further links:
http://www.gearslutz.com/board/so-much-gear-so-little-time/401331-robmix-tell-us-about-mj-1.html
Then
http://www.gearslutz.com/board/bruce-swedien/84587-real-story-billie-jean.html
etc.