Thanks for your insights.
I don't quite understand why Steve Cohen relied on the quants when he started off in tape/chart reading. He can rely on himself and I'm sure he can read the chart better than most people.
With the speed/complexity with which algos are spoofing-trading these days, there's no way he can tape-read as he used to do back in the early 90s... market has changed as Buy1Sell2 said in another thread, in its 'logistics'.