How often does google update ?
Google October 21st, 2007
Many people (search engine optimizers) say that Google updates 2 times or so a month. The last post I wrote has been indexed and updated. And that was a few hours ago. It is even turning for some keywords. I never believed Google to be this fast and dynamic. May be Google is in love with this blog 
Here is a screenshot of the last post in Google’s index:
Tags: google, website, blogging, search engine optimization
About
The same thing happened to my blog. I posted an update about webmaster tool and after 15 min, I got my website listed at #6 for the keyword “google webmaster tool update”. I think Google is updating its SERPs very frequently
Pratheep
Pratheep@ I believe Google is giving more priority to blogs. Static websites seem to be updated less often.