Yes, if you're using WDS, otherwise you only have three addresses used. Since you need the transmitting device to populate the DA, you can't just turn on bridging on a client and have everything work - you need both ends of the link to be involved.
Yes, for a wifi client (like in the article) you're right. manuel_w was talking about bridging on the AP and for that you do just enable bridging and it works fine.
