Our experience last night --
We went for the last concert -- Paul Revere and the Raiders.
We arrived at Epcot around 7:30.
We were at least the third party in line at Guest Services being told the AP viewing area was *sold out*. (Seems they should just place a sign out front if one party after another is coming and asking and being turned away.

)
We walked over the Friendship boats. We had just missed one. Waited for the other, along with several other guests.
We were turned away there too after waiting. They stopped running the boats.

(Again -- signage stating his would have been nice.

)
Heavily congested walk to American Adventure, since the boats were not running to help lessen the foot traffic.
We arrived probably 25 minutes prior to the last show. Plenty of seating.
We lucked out as the band was still signing autographs from the second concert. I think that freed up space for others to sit. Although many people were holding seats.
We still were able to have very good seats right behind the handicapped seating.