I don't think that is right, it says that automattic has 2000 servers but they also run things like gravitar, akismet, and vaultpress. Which makes me think that using that number is completely wrong. (Also these are just the load balancers not the back end, which could be taking up a large amount of that 2000 server count)
From the article it seems more like they have ~100, maybe less, for the load balancers which comes out to 175 requests/second per cpu which is getting a little more reasonable.
From the article it seems more like they have ~100, maybe less, for the load balancers which comes out to 175 requests/second per cpu which is getting a little more reasonable.