While the aircraft is in flight, the airport and flight pages show the estimated arrival time plus 6 minutes so we don’t have to fill the space with something awkward between when the flight actually lands and when we receive confirmation that it lands.
The expanded boards don’t include the fudge factor, because we’ve found that the users who use those are more often in FBOs or even ATC towers and want to know the real time.
It’s not a perfect system and there has been a lot of internal debate about it, but such is the world with 5 minute data ‘security delays.’