A proposal has been put forward to make Cinnamon the default OS for Fedora 19. If it is accepted then Fedora will become the first of the long established Distro’s to go down this route. Most if not all major distributions come in different flavours to suit the wide range of users who opt to use their work, but until now they have all stuck with Gnome and it’s new Shell, or released with another of the long established desktop environments.
The Gnome 3 interface is substantially different that the traditional desktop interfaces on both Linux and Windows. While it is good that there is research into new user interface concepts, many users prefer to have a traditional interface that they are accustomed to. … I’m not trying to start (or continue) a flame war here, so I won’t state any of my own criticisms of Gnome Shell here, but I will observe that a number of very high profile people in the Linux community, such as Linus Torvalds and Alan Cox, have publicly announce that due to problems with Gnome Shell they are switching to a different desktop and/or Linux distribution.
I submit the proposition that it is easier for a user doing a new Fedora install to start with a traditional desktop, and switch to the Gnome Shell if they prefer that, than to start with Gnome Shell and switch to a traditional desktop.