He knows it should be US, he just wants to know if USCIS is taking the answer seriously or if they're being lenient.

In my opinion, they are being lenient with our applications and I don't think that answer will affect you since the adjudicators can see your previous addresses and from what dates you've lived there, plus the evidence you send in for continuous residence.

Unless, you get a really hateful adjudicator who just wants to take the answer as it's written and discard all of the previous evidence, then you should be okay.