The article is interesting -- but the real fun is in the self-test. Dots flash quickly on the screen, and you get to decide, based on the flash, whether there are nore blue or yellow ones. This is the very line between perception and intuition. You do see them, but they flash by so fast that you can't count them. You must use some non-rational part of your brain to make the decision.
PS - I was very average -- see if you can do better! :)
Basics - Gut Instinct’s Surprising Role in Math - NYTimes.com