Most of the people seriously arguing that “this makes sense” are just revealing how sexist they are. It's one thing to say, “this is mostly true information about the (sad) world we live in” and another to say, “yes, I take someone less seriously because of the way they sit.” This is coming from a man. If you take someone less seriously because of a handshake or something like that, you are part of the problem. Don't even get me started on the “women are naive” sh*t, because I could introduce you to some female lawyers who would run circles around you in negotiations. Actually, most of the best lawyers at my old firm (which brought in billions) were women.