Is it like this everywhere? (USA)

In my location, Curbside orders get served off and sit while 10-15+ cars are pushed through the drive through. We've had customers call and complain because they have seen a train of cars go through AFTER the curbside customer had already placed their order, yet drive thru get served first. Curbside orders do not go out until the drive thru is empty. Is this standard everywhere? Most don't use curbside any more because the wait is horrible. I feel bad for those that still attempt it.