It probably has nothing to do with this but there is another account https://twitter.com/googuns which claims to be associated with google . . . . In particular the page has a title "Google Notifications".
"screen_name":"googuns"
"created_at":"Tue May 05 19:13:53 +0000 2009"
"screen_name":"googuns_dev"
"created_at":"Thu Sep 24 19:21:47 +0000 2009"
"screen_name":"googuns_staging"
"created_at":"Tue Jul 28 22:48:11 +0000 2009"
"screen_name":"googuns_prod"
"created_at":"Tue Jul 28 22:49:22 +0000 2009"<a href="http://www.google.com/ rel="nofollow">Google</a>