That was the case in Philadelphia too, a few days ago: Facial recognition, and no questions about food, or anything, asked by the machine.

There was, however, an agent between the GE machines and the exit (towards the baggage area), who asked orally each person, as they finished with the machines, if we had anything to declared. I told her the foods I carried (pasta, honey, spices, etc). She asked if I had any meat, raw vegetables, etc., and then waved me through.