I wish I'd been able to read the original post, too.
I think there's a whole range of "CIO" and it's not always the worst thing in the world. I've had a tired, hysterical baby that I tried rocking, singing to, walking, etc. to get to sleep, with no success, and then put the crying baby down somewhere safe, went to the bathroom, came back and he was asleep! Is that CIO?
Actually, I think with some babies, at certain times, our calming measures add stimulation that keeps them awake, and puttig them down for a few minutes, crying, even, can sometimes be the right thing to do. Of course, I don't mean you leave the baby getting more and more hysterical and clearly completely distressed, until they drop from giving up on anybody ever coming for them... that thought makes me want to cry.