That means it doesn't produce much of a wind loading effect. He interpreted the text wrong.
The 91XG is still your best bet from a performance perspective because of certain of its unique attributes, especially the adjustable base. You could try the DB8e if wind is truly a valid concern. We produced this video a while back:
www.youtube.com/watch?v=h30udVLNfSs Note: 55 m/s = 123 MPH.