I'm sure that there are therapies (and medications) that can be helpful, but it's pretty well established that children who have lacked normal human attention in infancy are permanently damaged. However, parents who are insane enough to fall for the patently abusive "therapies" recommended by some of these self-styled "attachment disorder" experts, would have serious problems with any child, adopted or biological. Anyone who can be convinced that it's normal for children to always to gaze lovingly into mommy's eyes, even when they're teenagers, and to wait for instructions as to where they may place their arms on mommy to hug her, is going to see "attachment disorder" in any normal child. And pursuing these "therapies" is a surefire way to turn any child into a raving raging lunatic.
"And pursuing these "therapies" is a surefire way to turn any child into a raving raging lunatic."
Anyone who thinks these "therapies" are worth pursuing probably IS some sort of raving raging lunatic.