I flew PHL-CLT-LAS on 17Aug (morning) and then LAS-BWI-PHL that evening-morning (red eye from LAS). I noticed that on the first flight (PHL-CLT) there were FIVE TSA peeps at the gate. I was in F and when I saw them I made sure not to be the first one on the plane; however, they didn't search the first F person on the plane....or the second or third (me). I don't know who actually got the booby prize and got searched.
Oh, the first people allowed on the plane were the special assist and families with brats, none of whom were searched. The airline was US, if that makes any difference.