Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
True that Linux world is going through a rapid change. There are three types of Gnome based distros I see:
1. Distros which are using Gnome 3 as such
2. Distros which have Gnome 3 but have their own modification as well, like Unity in Ubuntu, Cinnamon in Linux Mint, etc.
3. Distros which still prefer Gnome 2 or Gnome 2 derivative like Linux Mint Mate, Scientific Linux.
Snowlinux 3 Crystal too falls in the third category - a Gnome 2 desktop with Linux 3 kernel. Due to drastic changes happening to Gnome 3 & Unity, Snowlinux has kept Gnome 2 but with the updated Long Term Support (LTS) Linux kernel 3.2.0 LTS.