Culture Shock

I dont feel culture shock in the USA. Actually I feel really rarely 'Shock' about something. And there is some reason that why I dont feel culture shock in the USA.
Beacuse I study English quite long time and USA is a little bit familiar to me. Because my aunt lives in USA, my parants were lived in USA and I was born in USA. So USA is not extremly 'A New World' to me. But being a frends with natives is very hard. That is no language barrier. culture barrier. That is race barrier I think.