An awful of of people seem to waking up to the idea that TED talks are not what they're supposed to be. They attract a lot of kooks who can speak well and exude enthusiasm. How many times have you listened to a TED talk in your area of expertise and wondered how the heck that person got on the stage?
TED talks are just big soundbites and soundbites are not good ways to explain complicated, and potentially revolutionary, ideas.
