The U.S. Departmnent of Transportation issued its monthly report on airline on-time performance today, showing what a rough April PHL had. A news story on how the airport did, with US Airways highlights, is here. The story notes a good record for lost or mishandled bags for April from PHL's biggest carrier --something that couldn't have been reported until recently, with fewer passengers checking bags.
Details by airline and airport can be found at a Bureau of Transp;ortation Web page. Tje June Air Travel Consumer Report from DOT can be found at this link. The second one has detailed on-time reports and data on bags, bumping and complaints.