As one of the attendees at the Weenie Roast Concert 2011, I have the following things to say:
1) Rise Against did great.
2) Foo Fighters was an awesome surprise guest.
3) Linkin Park turned out terrible.
Don't get me wrong. I absolutely love Linkin Park, and I own all of the albums. I've been to 2 of Linkin Park's concerts before, and they were absolutely, unarguably superb. But, this time, the sound quality was unbearable. I don't know who messed it up, but the microphone was too soft, and occasionally cut in and out. The guitar was suddenly loud and soft, randomly. It was a nightmare, and I went to Weenie Roast specifically for Linkin Park. Lots of other people left early for the same reasons that I did. I'm still a fan of Linkin Park, but I'm just very disappointed today.