These all lead to dead ends: https://news.ycombinator.com/item?id=1721105 https://news.ycombinator.com/item?id=1881262

Do you have a link for the post you are talking about?

EDIT: In this thread pg says wait 30 seconds between each request (https://news.ycombinator.com/item?id=1702488), but that doesn't work either.

EDIT: "unimpressive" Was this is what you were referencing?: https://docs.google.com/spreadsheet/ccc?key=0AqL8kR005z0QdEN...