The uptick in 2010 has a lot to do with the introduction of git over http solidifying and I firmly believe that android's use of git, which is extensive and tha

The uptick in 2010 has a lot to do with the introduction of git over http solidifying and I firmly believe that android's use of git, which is extensive and that reliance on git coupled with the rise of the platform pulled an incredible number of developers onto Git and over the learning hump. If you can find the 'open source updates' from oscon on youtube/oreilly, Shawn Pearce gives an architectural update that will inform your speculations.