Smart Politics (which conducted the testing), claims Obama scored the lowest average of any modern day president. Even George 'Dubya' Bush, razzed about his lack of verbal skills, ranked higher than Obama, his dad George H.W., Clinton and Reagan.
JFK, Eisenhower and Nixon scored highest, with Kennedy at a 12th grade level, Dwight Eisenhower at 11.9, and Richard Nixon at 11.5.
The Flesch-Kincaid test is designed to assess the readability level of written text, with a formula that translates the score to a U.S. grade level. Longer sentences and sentences utilizing words with more syllables produce higher scores. Shorter sentences and sentences incorporating more monosyllabic words yield lower scores
He said his message was simple. So simple I slept through part of it. But, as per usual, there were overblown promises that he can't and will never keep.
You can view the charts here.