samatman parent
The population of the state of Georgia is about that of Sweden, so that makes sense.
The population of other national subdivisions is greater than that of Sweden and of most US states. That doesn't make sensible to introduce oneself with "I'm from Minas Gerais", "I come from North Rhine-Westphalia" or "I'm from Kaduna State" in an international context.
I've never heard someone from Berlin clarify that it's in Germany either.
It might make sense if Francisca had just said "from Córdoba" and Jayalalithaa "from Erode, Tamil Nadu". Since everyone was talking about countries rather than states, one would reasonably expect Peter to do the same, and thus assume he is from Georgia rather than the USA.