I think that Google's server farms are generally pretty close to being in sync, but they're not in lockstep.

FWIW, clicking on your Google link gives me "about 656,000" pages: [link|http://marc.merlins.org/linux/exim/sa.html|1st], [link|http://maxo.captainnet.net/installs/jaguar/mail-update.html|51st].

Cheers,
Scott.