Yup. It takes a while to see the abstract pattern underlying their behaviour. Once you see it, its very clear. But for a long time you're distracted by the details of day-to-day events and you think they're just another co-worker with some annoying habits.

I'm confused why so many commenters are quick to shout "B.S" on this article (are they BSers in hiding?) but maybe he is oversimplifying too much. True S-W types are pretty rare and are probably evidence of some extreme psychological disorder. (E.g., malignant narcissism or sociopathy. Robert Hare is a researcher in criminal psychology and wrote a book on such people: https://www.amazon.com/Snakes-Suits-When-Psychopaths-Work/dp...).