What does the speed of the acquisition of foreign cultural gestures reveal in one's personality?
I am wondering what does it really mean that someone picks up gestures of their non-native culture very slowly while others quite easily in a foreign country. Someone told me that in the US people serve themselves as guests in the kitchen, in India people shake their heads in a way a non-indian might not know wether it is 'yes' or 'no'. Still, someone gets the hang very fast, others simply continue behaving as they did at home. Does it mean the weakness of the personality, on the contrary flexibility or something else?