Yes, they did. You need unofficial modded INF files to install the 18x.xx drivers on the 7xxx and 6xxx series cards. I think 175.xx was the last to support (officially) 7xxx and 6xxx series.
www.laptopvideo2go.com (look at the driver downloads section on there forums for links to the modded INF files. No registration needed to download.)
185.20 beta is out too.