George
Some quick thoughts before I start work.
Posting a link (which most will not access) is not the same as discussing fully the content of the message, of course since the content works against your goals and philosophy this is not surprising.

McSlarrow seems to making specific reference to  polygraph success in uncovering espionage directed against our country.  You and others frequently state that this has never happened, (based on comments made by government officials favorable to your view) Do you think spies are merely "stupid enough to make admissions" or were they presented with evidence backed up with polygraph results leading to confession.

Is it possible that McSlarrow has access to classified information that you do not possess? Do you think he is so casual as to continue a polygraph policy without backup for his position that he cannot speak to specificially? Politically, it would of been far easier to scrap the program.  Its anecdotal to you because it must remain so.
Why do you continue to believe that your viewpoint is more credible than those that actually perform investigative work, see the tool in action, and value the result?
You have based your position on the fact that the CIA does not publish every investigative success.  Why would any agency with the complexity of mission that our intelligence gathering organizations deal with trumpet polygraph success? They probably would prefer that people adopted your view, and not take it seriously-possibly leading to an opening.

I guess the DOE has placed some value on those hapless spies making admissions.  Its amazing to me that you can make such sweeping judgements ( about someones intellect) without any proof what so ever.
I thought McSlarrow considered the NAS findings throughout his testimony, and your analysis of his viewpoint is simply a reflection of your bias.