The audio on the SB was pretty bad. I have a very nice DD 7.1 setup, and they really dropped the ball on this one. The rears had pretty much nothing on them, and the center channel was underused for everything. I could not put my finger on it, but the only thing coming from the center was the announcers.
It is like they played back the pre-recorded stuff and sideline stuff as two channel material, and did not re-mix for DD and put the common stuff in the center.
Of course the DD audio kept dropping out during the halftime show, probably every 1.5 seconds.
Perhaps those who were not having problems we not in fact listening to a true DD 5.1 feed from the channel. The DD 5.1 audio was dropping out for many people.