The "profilers" were a couple of kids. They let my wife and I pass through, and checked the bags of several 65 and 70 year old ladies who were much less of a threat than we were.
The whole thing looked random to me.
It was, however, very orderly and efficient.
When we got back to Newark, going through customs was chaos. Too few agents, too many people.
I could have been bringing in 100 pounds of coke and they would have never known it.
Coming back in to the USA, I could have brought a rocket launcher and a camel. In my shorts. If the camel would fit.