The methodology of collecting data like this is just another example of the TSA's mediocrity and incompetence. Obviously, nobody with any operations research or management engineering background ever had anything to do with this. Any data they collect, altered or not, would be meaningless unless you collected it after you determined a controlled scientific sample size of passengers and flight crews. But, this would involve the TSA's desire to improve itself, which we all know is completely foreign to their culture.
It's funny, though. I would have thought that the TSA would have lied in the other direction -- making the lines appear to go more slowly -- in order to justify an increased budget and more screeners at the airport level. The only reason I could think of to skew the results in the faster direction would be if you planned to lie to the airport management about how fast the lines were going.
Combined with the unprofessional harassment from the TSA manager and cop, this whole incident is just plain pathetic.
FYI, I copied my Congressman, who just happens to sit on the House Homeland Security Committee.