So, I'm pretty sure Terry just doesn't like that stuff and is looking for justification beyond that dislike. It's a big shrug for me, because people like what they like. I just worry that articles like his keep people from actually listening to extremely complex music. There are some people who might like Carter, et. al. who might not give it a shot. One reason I listen is that I like having my brain twisted up a bit; another is that the sounds themselves are arresting and often beautiful. And hey, I like a challenge.
I'd encourage anyone thinking about this to take a look at Daniel Wolf's posting today, about his recent orgy of re-hearing a huge amount of serialist music, which makes me want to hole up in a cabin for a month with his iPod and a stack of scores.