I don't even know what to trust anymore. A couple weekends ago at DFW I got a text from AA notifying me that my flight had changed to a certain gate. The AA iPhone app was telling me a different gate and my Tripit Pro was telling me a 3rd different gate.
The departure board at the airport was consistent with the iPhone app, so I went to the AC in that terminal and they confirmed that the departure board and iPhone app were correct.
20 minutes later they all synced up, but imagine if you had a tight connection and nobody to actually ask?