I'm sure he does some extrapolation, because there are several teams that currently have partial schedules. I doubt AD's submit them a few games at a time.
It would have to be a well distributed half to get a full schedule for all teams. Theoretically, there's no reason to believe if half of the schools in the Indianapolis area submitted their schedules, you'd get the same percentage in the Fort Wayne area. Not necessarily. If one school is getting a new AD, it could delay submissions for several teams even if all the conference games are set.