fwilliams: looking at this comment, in hindsight, I wish I could soften it. I did make what can only be described as "general claims," and now feel more than a bit dumb for saying otherwise... sorry about that. (What I was trying to say, but evidently did a poor job of articulating, is that the authors of the paper are not making general claims, even though they do speculate about the potential usefulness of their work.)