My AA from Philly got changed too, an hour earlier then previously so I'm not mad but what's up with them doing that? What in their system says moving a flight on July 1st an hour earlier will help with X (Idk, solve for X). That being said, that should be enough layover time to make it. I travel out of Philly a lot for work and they are USUALLY good about having enough security lines open and such! What date is your flight?