Although I am not nearly as snobby as you, but I also pretty much ignored them thinking pretty much the same thing. I've been enjoying listening to them lately. I hate being wrong about a band but I love having more music to listen to :)
I was at that concert, having been a Nickelback fan since their 04 debut. I have been to 5 Nickelback concerts for the same reason... every time I see them live, the sound is equal to if not better than a studio version. They are consistent, energetic and talented. If you haven't seen them live, you must!