My college roommate, a surgeon, not prone to exaggeration, and a frequent world traveler, said that he will not go through Amsterdam again.
He felt that their questioning was almost hostile in nature, and that their frisking at the gate was "very intimate."
This was for a KLM (not NW) flight from Schipol to Boston earlier this year.
I'd like to think that his experience was an exception and not routine.