This is not Open Source in the traditional sense of OSS, but it is rather open source platforms (hardware, specifications, technologies and software) through the [open compute](<a href="http://www.opencompute.org/" rel="nofollow">http://www.opencompute.org/</a>) initiative.<p>The article is very scarce on detail, but let's take Zuckerberg's word for it that they saved 1 Billion. I am curious if that is simply the energy saved or also less tangible benefits like better cooperation and integration.<p>Also, how do you arrive at a comparison? It is not as if there wouldn't be progress without the Open Compute initiative. Let's hope they bring out the numbers in more detail