The moderator simply tries to review submissions with respect to the guidelines, and get them approved and posted as quickly as possible. We generally do not edit or modify submissions. The turnaround is normally just a day or so. If, however, the moderator gets called out of town or tied up in a project, it might be a couple of days. The level of traffic on sat.announce is very light.
Some people look at that and think since the group is so small, nobody reads it.
They think it might be better to use a bigger group, such as sat.general, for their announcements. In fact, the opposite is true. Your announcement doesn't have to fight for attention among masses of other messages. When you use sat.announce, you do not have to run a gauntlet of killfiles to get your announcement seen. We often are asked why.