I've heard things like that, but I've never seen much proof to it.
I know a guy who always sat and stared down, never said much...
Now he's the OWNER of a very lucrative furniture business locally. His son is the same way, and he is the web designer/top image designer type person of the store. I thought maybe it was because his father owned it, but when I looked into it he's actually very good at what he does, and he is paid very highly. In another case, I know someone who is very loud, always sits the "boss" way [much as I am now, by the way] and yet he currently works at a McDonald's.
So it's iffy, but I think it's due to "if you sit that way, you must have the mentality to go along with it."
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y por lo que el león se enamoró de el cordero...
lo que es un estúpido cordero