In any case, there is definitely a vocabulary disconnect when people claim to be randomly selected 10 times in a row - if that is really true, they should be filing a complaint/lawsuit against TSA for harassment. Routed through the NoS is generally different from TSA-defined 'random selection', but I think people are using the terms interchangeably.

I thought surely my example (where every few dozen people, they would open the NoS and direct one person through it, instead of the WTMD) surely counted as random selection. I guess I'll just wait until TSA publishes its definitions.