It had been written by (at the latest) September 2008:

https://googlesystem.blogspot.com/2008/09/best-gmail-error-m...

That’s pretty presumptuous, but especially so when there are comments parallel from googlers pinning the date and it’s easily determined by using this very powerful information retrieval tool called “Google.” Not to mention the possibility I work at Google, or that I wrote it myself!

If you use Google to find this string you will find very old references. (“Very old” is relative)