The author of that article posts the below picture to display the 09/12 crowd and performs much of his analysis of the crowd size from that picture; however, this picture is not a picture from 09/12: (i) None of the tents for the black family event in the public area is shown; (ii) the stage in the picture is shown on the Washington Monument side of the pool rather than the Capitol side of the pool where the stage was located on Saturday; and (iii) there are no people shown on the Capitol side of the pool, while that is where the highest density of people was on Saturday.
That discredits the entire analysis.
It would be nice to know what event that photo was from, however, and find out if there was a crowd estimate.
