I've read this report, published in the TOI and feel that there is some truth in it. I also believe that those who are blunt and tell you things to your face, without sugar coating their words are as honest. Such people do not hide behind facades of morality or what is socially accepted. Their actions and opinions are as open as they are.
I don't use profanities, but have stopped feeling awkward around those who do. Profanities, when uttered in normal conversation, begin to sound normal, when you interact regularly, with an individual who uses them. I have stopped being a prude. I also realise that judging people based on their vocabulary makes me a shallow and vain person.
Studies are based on many factors and it is only after much reflection that results of any study are made public. Each of our actions is somehow related. It is little pieces that make us, and these little pieces comprise of things we do and the qualities that we display. It's like studying body language and knowing whether an individual is being truthful or not. It's like listening to a person talk and knowing whether they are sincere or not.
Interestingly, another study that I saw on television showed how using profanities could help alleviate pain.
Leadership is having a compelling vision, a comprehensive plan, relentless implementation, and talented people working together - Alan Mulally