I would like to throw out there(and I may be incorrect) that EU uses different software on their AIT/WBI machines. They don't have anyone looking at any image of anyones naked body. It is just a stick figure shown on the screen outside of the machine with a red box highlighting areas where the machine has noted an anomaly. So if you are getting patted down after going through one of the EU machines that is your own fault for not divesting properly, because the machine spotted something not a person in a locked away room.

Personally I have heard from the people installing the machines at ORD that there is talk of going to this software here in the USA. Wether or not that happens, who knows. Those guys are the low people on the totem pole in their company, so they may be right but they may be wrong.