Looking at the roll call for Round 1 Wharton applicants:
Self identified Non-US: 14/27 (~50%) received invites
Self identified US: 13/58 (~22%) received invites
No geographical ID: 13/65 (~20%) received invites
Looking at this, obviously with a grain of salt given the large number who haven't identified their geographical location, it seems like there may be some truth to the theory that most of the international invites are already given and many of the remaining ones will go to US applicants. Especially given the dearth of international hub spots remaining and Wharton's insistence on not opening up anymore international spots.
Hopefully this means we US applicants have some good news coming our way over the next few days..