>>Average Flesch-Kincaid Grade Level for Orally Delivered State of the Union Addresses by President Since FDR
I guess they haven’t updated it yet. According to the article he scored 8.8 in 2010, 8.1 in 2011, and 8.4 in 2012, which averages out to an 8.4. That places him below Bush41.
I pulled this table from last years analysis, intending to show that he's getting worse. In the cutting and pasting of the table, some of my own text got lost.
There is a table in the thread's linked article that is this years. 0bama has dropped to the bottom of the table.