And it's really more complicated that any of the posts reflect, as there are many possible variations. Here's a look at who could be on the plane in what order:
1) People who were flew in on the same plane from another airport and are continuing their flight on that plane.
2) Medical preboards and unaccompanied minors.
3) Business select passengers.
4) A-Listers who started their travel earlier in the day and are connecting to the flight.
5) A-Listers starting their flight at your airport (not entirely sure about where exactly all the A-Listers fit in)
6) Passengers who started their travel earlier in the day and are connecting to the flight who used EBCI.
7) Passengers starting their travel at your airport who used EBCI.
8) Passengers who started their travel earlier in the day and are connecting to the flight who checked in at 24 hours.
9) Passengers starting their travel at your airport who checked in at 24 hours.
10) Everybody else.
Not all of those factors will come into play on every flight, but on some flights all will. As you can see, even with EBCI there can be a lot of people in line or on the plane ahead of you.
1) People who were flew in on the same plane from another airport and are continuing their flight on that plane.
2) Medical preboards and unaccompanied minors.
3) Business select passengers.
4) A-Listers who started their travel earlier in the day and are connecting to the flight.
5) A-Listers starting their flight at your airport (not entirely sure about where exactly all the A-Listers fit in)
6) Passengers who started their travel earlier in the day and are connecting to the flight who used EBCI.
7) Passengers starting their travel at your airport who used EBCI.
8) Passengers who started their travel earlier in the day and are connecting to the flight who checked in at 24 hours.
9) Passengers starting their travel at your airport who checked in at 24 hours.
10) Everybody else.
Not all of those factors will come into play on every flight, but on some flights all will. As you can see, even with EBCI there can be a lot of people in line or on the plane ahead of you.