I doubt that Google The Corporation gave an Official Blessing to this obvious knockoff of Yahoo!s IE 7 toolbar upgrade page. Jeremy Zawodny over at Yahoo attributes it to laziness, stupidity or a mix of both.
Before Google starts threatening to drop page rank, they’d better clean up their own ranks.
Update: Matt Cutts responds with examples of extreme similarities between Google’s text ad design and Yahoo’s. Maybe they should all just merge.