There is a bit of deception by TSA though in that the widespread onset of TSA's ID-check theater has happened around the same time as the widespread (and foolsh IMO) setup of checkpoints to have multiple x-rays feeding to a single WTMD. The increased bottleneck at the WTMD (particularly when multi-person groups or involved, when someone doesn't know how to not alarm, or when travelers (like myself) refuse to release their laptop into the x-ray until waved into the WTMD by the WTMD screener), may be masking the ncreased bottleneck at the ID-check.