I wasn't disagreeing with you +Thomas Hey'l
: the question was "what's your
preferred method", so my
preferred method is meta tag as that what Google themselves have configured Google Sites to use and no other option is either available, or easier, to a Google Sites user with a custom domain (Google Sites are automatically verified with the sites.google.com
URL but not many people want the sites.google.com
indexed in search and <link rel="canonical
" /> is not something supported by Google Sites).