If I'm not mistaken, as far as raw computing power goes, the human brain is more powerful than a 286. The question is--and this is something I'm honestly wondering--whether it's feasible, given today's technology, to turn the brain into something that can actually use that power in a fashion that isn't horribly indirect. Every brain is powerful enough to play dual 35-back perfectly (if I had access to brain-making tools, I imagine I could make a dual 35-back player using a mere 70,000 neurons); it's simply not sufficiently well-organized.

If your answer to the above is "no way José", please say why. "It's not designed for that" is not sufficient; things do things they weren't designed to do all the time.