In a tour this small, I think it's perfectly reasonable to expect very little actual wear and tear. We all have music collections we probably treat with great care - there's no reason we shouldn't treat someone else's resources as carefully and perhaps even more so than our own. I personally have no idea how, when or where damage to the CDs happened, but I have them in my possession right now and can say I was a bit surprised at the condition they were in (on the data side, not label side). I've dropped a CD or two in my day and have some I've played hundreds of times and they still look pristine, especially in comparison to the tour CDs.
Mike