While we talk of "standards" what is really being noticed is individual performance. We are noticing how individuals do their assignments with differing diligence, skill, concern, competence, etc. The XRay observer is looking at the screen. (Sometimes paying attention, sometimes thinking of his date last night.) The Wander (new job title) is wanding. (Sometimes with concern and energy, sometimes with a pressure to process quickly, sometimes with a concern about his green card.)

If we were to compare all Burger King "counter specialists" we would find variations, even though they were all told to perform certain functions to a standard.

The security screening personnel have to be elevated in competence and respect and be exposed to more standardized training before we frequent travelers will see any common level of performance.