The first act, Gogo Bordello the two songs shown didn't do much for me and could barely understand lyrics, though the song they played during the crawl did. Also, not the best performance I've seen of Ben Harper and Relentless7 . Go figure, it's kind of hard to up stage the Dave Matthews Band, really tight and good musicianship.
I hope that it was a so-so director choice and not Dave Matthew's decision to show what appeared to me as substandard selections by the warm up acts for fear of being outdone.
I did like the Dave Mathew's Band performance. The 3-D effects are good but still need serious work. Too much cardboard put up affect at times.