"Whenever your site adds a new incoming link, Google will find it when its spider crawls your site. That link will be calculated at the time of its indexing. The link will provide its link boost to your site in the search engine rankings upon its discovery. What that means, in simple terms, is by the time the actual backlinks are displayed by Google, the links have already had their values included in the search calculations."

http://www.seochat.com/c/a/Google/Go...d-for-Panic/2/