In a list of countries that are otherwise sorted alphabetically. Should United States be sorted the same as other countries, or should it go at the top of the list. This question would be asking about a user interface in which people have to select their country, and most respondents would be expected to be American.
So should your pull down list be sorted so that "United States" can be easily found at the top of the list:
United States
Afghanistan
Albania
...
Zambia
Zimbabwe
Or should United States be sorted with the other countries starting "U"
Afghanistan
Albania
...
United Kingdom
United States
Uraguay
...
Zimbabwe