The funny thing is that we aim to create AI based on our understanding of intelligence. Once we are truly successful (which trust me we will achieve sooner or later), we might witness the self-improvement of an intelligence, which we haven't even imagined to be possible.
Yes it's true that in some manners AI is behind it's development. We still haven't figured out our own processes - thus it's impossible to create something which we don't understand.
Thank you for your comment and for the TED talk my friend :)