He was talking about how current models of the brain, such as the one by IBM (http://www.kurzweilai.net/ibm-simulates-530-billon-neurons-1...) which has over 5 billion neurons, might be larger than Spaun, but none have demonstrated any of the AI that Spaun has. In particular, it's ability to solve basic problems, similar to that of a toddler. He didn't mention a problem in particular, simply that some of the things Spaun was able to solve, they weren't entirely sure how to explain it - but they were sure that they could reproduce. Which to me echos the fact that the brain is a very complex thing that we are still very far away from understanding.