What this article points out is something a little deeper, in that knowing the language and culture will allow an individual to social engineer through challenges. I've done it with the medical community, also in Wall St. finance, but it's most useful in my day-to-day life when going out to eat in a restaurant. There are cues and phrases to drop which can alert a competent server as to the experience level - and possible expectations - I will have of the meal. Being deeply involved in such things can have that affect on people, at least it really has for me. Criticism from another industry participant tends to sting more, because it cuts to the point.