Announced attendance is for tickets sold (including season tickets), not butts in seats.
If jupitertoo's math is more accurate than some of the other claims he's made on ZN.O, 7,671 - 1,027 = 6,644 no-shows.
Actually, 6,644 no-shows would not be accurate without factoring in the number of people in all the suites who would not show up in a grandstand seat count.
Don't forget counting all the vendors, security, maintainance, and training staff. Plus the ESPN TV crew.