Saletan`s arguments are completely arbitrary. Using phrases like "Fiteen minutes? Come on!" is not a serious way to start refuting a cientific study. His tone just underscores his weak reasoning.

Moreso, in this case 15 minutes for each one of the participants seems like more than enough to record a pattern. If each participant hits the button just onece every second, that´s 900 samples for each one. And once every second is a "conservative" estimate, even for a slow mind.