I saw them live about 3 weeks ago, and they were amazing. They played almost everything off Leviathan, and 2 or 3 songs off remission. Perfectly, too. Some of those riffs are fucking crazy, but they nailed them.
That dude who said he turned his back on them while they were playing sounds like a dick. If someone did that at a show I was playing, BAM MIC STAND IN THE FACE MOTHERFUCKER.