I had a return flight through PHL on a Thursday next February which I booked with 1 hour, 35 minutes to get back through security and to the F terminal. I knew it would be tight, but since I was going to be alone, thought I would give it a try.

AA changed the layover last week to 1 hour, 17 minutes and I said no way. Called AA and the first agent said he could not do anything since the change was less than an hour. Told him I knew the airport layout and it would not be possible. He put me on hold and when the call timed out 20 minutes later, I called again. This time a different agent said no problem and I am now booked through CLT with more than enough time to spare.