Ours are proper walls with two sheets of gyprock (which I think you call drywall). People also take as many phone calls as possible away from their desks in the meeting room or kitchen. I find that it works well for me.

For every minute I might lose being distracted by someone chatting, I gain back another time by feeling pushed to work. If I'm at home, it's too easy to get up looking for snacks to procrastinate.