I've gone to many rock concerts in my time, and I've learned that often the concert sound has nothing to do with the band. A very talented band can be made to sound like crap at the sound board. Much like the problems cited above with the mastering, the concerts are often too loud when they don't need to be that loud. The worst offender I've seen is Rush, in every concert since the Presto tour, they've just been so loud that I couldn't hear any individual instruments. Coincidence?