Last year I was in IAD RCC and checking my app for a UX departure for MIA and the app indicated that the flight was delayed due to inbound airraft arrival by about 30 minutes. I checked the "Where's this flight coming from" and sure enough the inbound flight was "indicated" to be on final approach. So I meandered down the concourse taking my time when I hear my name on the loudspeaker to board immediately. I ran to the gate and was the last one on, they closed the door behind me.

So in this case the app was wrong, way wrong.

On the other hand, in SYD last year the monitor in the Koru Club indicated on time departure but I could see the equipment parked across the tarmac with absolutely no activity whatsoever. I asked the desk agent waht was going on, she said everything was fine, then I pointed out our 744 sleeping peacefully on the shores of Botany Bay.

Shortly thereafter a buzz developed in the club, so I checked online, and sure enough it showed cancelled, MX, even though the board and the agents were still uninformed.

So it goes both ways.