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](http://www.opencompute.org/) initiative.

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.

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