The default desktop task has been changed from GNOME to Xfce within the Tasksel Git. While one might assume the change is due to the criticism expressed by many GNOME users since the 3.x series — with some saying it’s losing its relevance on the Linux desktop — the main reason expressed within the Git commit comes down to Xfce being able to fit entirely on the first Debian CD.

via [Phoronix] Debian Now Defaults To Xfce Desktop.