Could airlines directly post any changes in departure time or expected delays to passengers' twitter accounts rather than announcing them at the gate area? In our experience, each such overhead announced spawns 200 phone calls that all sound roughly like this: "Hey sweetie. I'm at the gate now. We're supposed to be taking off at 7:20, but they just said we'll be delayed 20 minutes... Is that junior? Hey boy-o! Daddy'll call you when I land!... Oh, wait, they are making another announcement. Gotta go!"