Around May 2011
April 2011, not found: https://web.archive.org/web/20110204131427/http://www.google...
May 2011, similar text to the current one: https://web.archive.org/web/20110507142249/http://www.google...
Discussion at that time:
May 2011 - https://news.ycombinator.com/item?id=2522220 - 57 comments
Discussion 8 years ago:
April 2016 - https://news.ycombinator.com/item?id=11498672 - 89 comments