Using the Flesch-Kincaid readability test, Vocativ analyzed more than 600 speeches from all the American Presidents for ease of comprehension. What they found was a trend toward simpler language as speeches needed to appeal to a wider range of people, not just super-educated white men.
I think President Obama, no more or less than President Bush, tries to pack a lot of nuance and subtext into language that is as plain and straightforward as possible. While President Bush was often inarticulate off the cuff, Bush’s speeches were underestimated. There was a crisp formality to a lot of his best speeches, particularly the ones he delivered shortly after Sept. 11.
Definitely click through for their analysis of the data.