I think they did well, the problem is that the venue (Toyota Amphitheater in Wheatland, CA) doesn't play to their strengths and the microphones didn't seem to carry anyone's voices well on Friday night. They were good, though!!!
Uploading a couple short clips just in case you are interested (might be a bit until they are processed and ready to view). They were shot from far away with a cell phone (using a digital zoom), so the video/audio quality stinks. But you can tell the voices during their performance just weren't carrying to the lawn seats well. For Kelly Clarkson it was better, but still not as good as when we saw Brad Paisley there a couple months ago.