Both Kellyanne and Sean were referring to the total crowd size including TV and internet. As far as physicial attendance, as lurkinandloomin indicated earlier on the thread, the wide angle shot showed more than Obama 2009. I think you needed tickets to get in the area between the Capitol Building and the Washington Monument.
I doubt that the 2009 crowd had to go thru the scrutiny that Friday's did; just to get ONTO the Mall!