CNNN, I suspect, is a spoof comedy show. Further, I can reproduce that "proof" anywhere in the world by interview a hundred people and picking out the dumbest in the crowd. To use that to say that Americans are stupid is complete and utter crap.
Why is it socially acceptable to say that Americans are stupid, but if anyone were to turn around and say that about any other country in the world that would be bad? If I were to say that Italy were fully of swarmy stupid men who use too much aftershave, I would be racist. If I were to say that England were full of dumb football hooligans who only like to fight, I would again be racist. Yet it is ok to say that Americans are all morons who don't know anything other then fast food jingles? Bull. That's racist. That is also ignoring the continuing contribution of American scientists, historians, authors and singers. It is also ignoring the contributions of many of the American posters on MAP.