Google owns Blogger and hosts all their official blogs there. Example:

http://analytics.blogspot.com/

That does not prove gmailaccountrecovery.blogspot.com is an official blog though.

Edit: for clarity

The site you've linked doesn't have any Google branding. Moreover, none of the real Google blogs have adverts on them. In addition, the visual design of the page looks rather unprofessional.

It's very unlikely that this site is affiliated with Google.

Plus there is some other hint: " This page is not sponsored by or affiliated with Google."

Agreed on all that; my post was just addressing the last question.