I am always a
little weary of TEDx. The organizers aren't TED, they're independent, so the presenters aren't always vetted to the same extent. As a result, there's been some pseudoscientific nonsense presented at TEDx events and the brand came under heavy fire for it.
http://blog.tedx.com/post/3740528067...nd-bad-science
http://www.skepticink.com/tippling/2...e-controversy/