Whilst I personally agree that talks are better when you learn something new, there seem to be whole conferences dedicated to intentionally restating the same things over and over again. Its almost as if some people go to these events to have their ideas _confirmed_. Project management conferences I am looking at you!
I agree but I'm not sure this is intentional... I've the feeling that commercial conferences are just simpler to run that way: professional talk-giving persons always saying the same things over and over, with little efforts and without being part of any actual "research" in the field.
