A lot of variation in search results across various google data centers is being absorved since last 2 - 3 months. It does appeared that google dance is on it way. I have been keeping a track and many a times puzzled as well but i have observed certain facts during these analysis. Gone are the days when we use to see same search results across various datacenters. Intentionally aiming at making the search results more efficiant and useful for users based upon the location they are searching, changes are implemented by google. If we search a term in google.co.in for say call center most of the results retrieved are more or less related to India, while search the same query in google.co.uk and see the results. Most of the results have .co.uk in domain names or are related to UK. Although there is a feature for search by pages from UK, but still in order to make search result more viable for the user websites efficiantly promoted and related to UK is getting higher rankings. Similary search the same term across google.fr and other google domains. All these have made search more viable for user but more headache for SEO's. Based on this if i have website on India Travel and i wannt to target outside India traffic i might need to go for country specific domains and promote them. Although still it is debatable but i have anaysed similar trends with many other keywords as well.
If you own a site where you want international users, don't use a country specific domain extention. All the google domains search through .com extentions, don't they? And give them as top result if they're most relavent.
*yawn* Wake me up when Google fixes the site: bug and google.com looks like the datacenters!!! Then we can talk about Google doing a real update.
Ping Mods: Anyway we could maybe get a sticky titled "Google Update"? One that explains why not to use it as your title? -Michael
Dude i just came up with what i felt, u r more experianced than me and you can correct me if i am wrong but this is what seems though based on analysis over last 2 months...