I might be wrong (search turns up nothing), I have seen this before though and thought it came from here (since this is usually where I find my quality reading material).

No need to get all downvotey, I wish I had the authors abilities.

I don't know if it's been here in the past, but it was linked in http://news.ycombinator.com/item?id=2644863 a couple days ago.

Yep, that's where I found it. I figured it was worth its own submission.