At MIA this evening. TSA told me you can only step up to the boarding pass check (once you have finished queuing just before the scanners) together if you have a child traveling with you. If you are married and traveling with no children (or part of the same group but with no children) you have to step forward one at a time to have your boarding pass checked. Never happened at MIA, MCO, TPA, JFK, EWR or BOS before.
Also told that you could not decline to go through the nude-o-scope.