Sounds about right.  Countermeasures work, and they work very well, especially mental countermeasures.  That is how I lied and passed the FBI poly.  The word is spreading that these countermeasures work and there is no counter-defense for these counter-measures, so all polygraphers can do is accuse someone of using them and hope that the person confesses.  I hope you pass.  The polygraph is a joke and more people are learning how to beat it.  I hope the world learns how to use countermeasures effectively and beat the polygraph, rendering it useless.