I'm pretty sure the polygraphers can detect CMs, afterall, they caught me!  If you guys are expecting the polygraphers to come out with some big announcements saying "We can detect all polygraph CMs, and here is how we do it...", that is not going to happen.  They probably assume that once they tell us how they can detect CMs, that us anti-poly people will just come up with a new CM method.  I bet the polygraphers practice the CMs on each other and have been doing it for years.  I'm sure it is easy to measure someone's breathing rate, tell if someone is biting their tongue, or anything else.  Mental countermeasures are probably your best bet because nobody and no machine can tell what you are thinking....yet...