That's the one thing US Mgt does not seem to get a handle on. I have the pleasure of arriving at PHL once a week (B or C terminal) and my experience mirrors all of the posts above. I'd say the majority of my flights the bags arrive 25 - 35 after we reach the gate. Once in a while they are early and once in a while I think they were sold on e-bay!
I probably should be happy with the 25-35 but my outbound destinations all beat that easily.
If I had a wish and could only change one thing in PHL baggage, I'd leave the time alone and do something about the information provided to passengers. I can't tell you how many times I check the monitor to see where my bag is supposed to arrive and 30 minutes later it shows up on another belt. No announcement, no warning, you just have to walk to every belt that is belching bags and check the tags for your flight number. SO I pull mine off the belt, walk 4 belts over and tell the poor folks waiting their bags are over there.
Wow