I think we have been picky about responses we choose to consider (invariably negative ones apparently) and discard the really interesting and deeper choices.
It has been obvious from the start the GNOME Shell was designed to be extensible (a whole lot of extensions really, have you done a yum -C search gnome-shell-extension in Fedora 15 lately?) and the recent discussions around setting up a website to make this process easier with no restrictions beyond robustness and security should have been enough messaging but unfortunately lost in the noise. I think, GNOME developers should have been vocal to compensate and they have failed to do so as well. I hope they do better marketing (beyond just gnome3.org).