I think that probably is the case. FOX and others rarely manipulate AFD themselves. What changes is what the AFD code is on a per-program basis, and that is baked into the metadata, so is determined at origination and really not ever at the station forwarding that info, although they do have that technology.
We are seeing reports of multiple aspect ratios, possibly anamorphia, etc., from various parts of the country, but that is usually due to how folks have their TVs set (which they may not even be aware of). AFD only works between AFD-aware equipment in the delivery chain and only on AFD-aware TVs. Since it was not implemented until 2006, sets older than this will definitely not respond to it, and sets from 2007 or 2008 or even later may not either. Sending in anamorphic is never done, and sending in weird stretched modes hasn't been done since TBS and TNT finally wised up a few years ago.
This I know for sure: there is but one delivery option on the backhaul sat and that is 4:3. If it is filling your 16:9 screen it is either doing that anamorphically (stretching the image) or because the AFD code in that program is blowing up what would otherwise be a 16:9 postage stamp to fill the screen. If it is filling your 4:3 screen it is due to the natural 4:3 image. If it is letterboxing on your 4:3 screen that is because they are sending a full 16:9 image for that particular movie to HD sets with AFD. I doubt they are center-cutting at all, but maybe.
As for guide info, this is a big launch, meaning all 22 FOX O&O markets and possibly some other markets are getting it all at the same time, and that may be overwhelming Tribune or whoever handles the guide info, and they are unable to keep up. Summertime vacations and a holiday weekend does not help. They'll get there.