How very odd. Those people said some very specific things that are totally backwards of what I'd expect or know. For example, the one guy said that comparing it to the AC30CC was an unfair comparison, because it has more power and is clearer and more open. Another person, though referring to the new AC15, which I haven't heard, said that it's too middy and not as open as the AC30CC in comparison.
My experience with the CCs is the total opposite, and I've confirmed it to myself many times. The 30 does not appear to be any more powerful at all, and no matter how I've set them up, it always sounds like it has a bit of midrange cloudiness in comparison to the AC15CC.
Obviously, I'd just have to try it for myself, anyways, but that's all pretty weird to me.