Perhaps I'm crazy but didn't this just make the front page a couple weeks ago? Interesting though it is.. has anything changed?

Edit: I must be crazy because the date on that says 14..

Was this it? https://news.ycombinator.com/item?id=4582253

You aren't crazy. Engine Yard routinely syndicates posts they find interesting and relevant that they wish to reach their audience. That is fine. But in this case the HN entry is a dup of a previous post. :)

I do not think everyone fully appreciates how much overall application performance could be network-bound.

This is definitely the sort of tuning everyone should be doing on their production instances.