Google says otherwise: http://googlewebmastercentral.blogspot.com/2009/12/handling-legitimate-cross-domain.html http://googlewebmastercentral.blogspot.com/2009/

Google says otherwise: http://googlewebmastercentral.blogspot.com/2009/12/handling-legitimate-cross-domain.html http://googlewebmastercentral.blogspot.com/2009/12/handling-... No doubt they must use other indicators to ensure the authoritative source.