Most of US Airways' flights go out of Terminal C (which is the third pier in the main terminal). When I flew out of there a couple of weeks ago, they had all lines open. If I am remembering right, in two lanes (on the left and right), you have two x-ray machines leading to a NoS/WTMD combo. Some pax able to avoid NoS if they timed it right (e.g. if they went through when the NoS was already occupied). In the middle lane, you had two xray machines leading to only a WTMD. However, it is a crapshoot whether this middle lane will be open.

Some US Air flights -- I think mostly RJs -- also go out of the center pier in the main terminal. This checkpoint, as of yesterday, has NO NoS. It makes me want to fly American/United (that have all their flights in this pier) all the time.