This is really interesting. I can identify with the mobile only users stat. I personally believe that a good number of that group are from my dear country (Nigeria)! With a population of over 140m and very few having access to desktop computers, I know that many Nigerians access Facebook every day. Definitely about 80% access the internet on their mobile phones. This is really a good signal for those of us marketing online. Will definitely be using this for something good! Thanks for sharing.