The general opinion appears to be leaning against it if for no other reason than Attachment Theory is HUGE right now - and not just in parenting. I find it applicable to adults too! And then of course there's the extremes on either end of it.
I think the cry it out method takes the idea that kids are manipulative - which they can be, but aren't always - and decides to teach them from infancy that it doesn't work. I've never found any all or nothing technique to work in anything else, I don't think that parenting is unique in that aspect. And since all babies can do to communicate is cry, it seems misguided to me.
I tend to lean in that direction, too. But if I were to dare to label myself any kind of parent, I'd call myself a Continuum parent based on the stories told by Jean Liedloff. I used to read a lot of Dr. Sears before he was ever asked to be a leading contributor to parenting magazines. So, it's weird to see attachment parenting gaining this much ground.
And in regards to Ferberizing babies and toddlers, I see the method as taking the perspective that a baby's cry is perceived as a disciplinary problem, rather than a biological response cue. Cooing, giggling, and crying are pretty much the only ways a baby can vocalize in communication. Others are obviously shaking the arms and legs and rooting with the mouth. But I find the idea of a baby's cry as a form of manipulation as giving too much credit to the baby's mental development and awareness.