Okay, I found that link both interesting and disputable.
That was pretty much the reason I submitted it in the first place. :P
I myself do not wholly agree with the position that biological sex is a 100% social construct, but I did find that the points raised in the article gave me an interesting and novel perspective on gender. I've got to be honest though, I'm not certain what you mean by:
What I don't really get is, what do transpeople associate with gender?
I should probably state as full disclosure that I am cis, but I am fairly certain that most transpeople associate the same things with gender as cispeople do. As well, most cispeople and transpeople are not 100% stereotypically masculine or feminine. In my experience, most transpeople are not disgusted by typically cis behaviour (although then again that's just my experience).