Honestly, if you don't see an upgrade by Wednesday (your T-3 day mark), you might be concerned since there are only 4 seats left to sell. You can find specific inventory by subscribing to KVS (Windows only app) or expertflyer.com. These services (which cost $$) show specific fare buckets. That's how Geo was able to see that there are a lot of coach seats and only 4 F seats available as of now.
What's likely is that US held back some seats from free upgrades hoping for a few last minute full fare coach bookings (which would get first dibs at elite upgrades). They may even get some people who buy a last minute F fare (not likely).
So, if you have desirable seats in coach and are ok with flying in them, then there's nothing else to be done other than wait and see. If your wife will divorce you for not securing F seats in advance, then....maybe 30K points isn't such a bad deal.
