Of course there are many factors that you have to take into account, like the number of sub-projects that Gnome is consist of. However from the 137 repositories that Ohloh counts, only gstreamer doesn’t lie in Gnome Git. But anyway is a propaganda day :)
Arch Linux Packages in third position. Maybe Ubuntu has 1000 times more users than Arch, but the community of this distro is from another universe! ..popularity doesn’t say always the truth ..nor statistics of course!
There are lies, damned lies and statistics, but the truth is that Gnome -and therefore Gnome 3- is the largest community based desktop project, or software foundation if you prefer. And the huge advantage in Gnome is that they keep and maintain exclusively their infrastructure and software stack. They are totally independent from any third party decisions.
Ok things could be better, but that doesn’t mean they are bad.. are they? :)