The current popularity of Twitter and the fact that Twitter are trying to turn them selves into a real time search engine has made Google stand up and react.
Although we all know that fresh unique content was always essential to build power and authority on your site and also give your new post a freshness boost, there has been a slight tweak in the algo from what I am seeing over the last few days to give further power to fresh posts from authority and powerful sites.
What seems to be happening is that when a new post is created it gets indexed and then placed into a Top 10 position for some highly competitive terms, this ten over the next few days drops off on to page two, three and then eventually disappears from the SERPs.
It seems as though Google have increased the algothirm to bring in fresh results a lot more. Again this is great for that extra little bit of exposure.
A great example of this is the term “SEO”. Firstly it was Dave Naylor’s post about geo targeting which came straight into the Top 10 and then slowly faded out as the post aged and then the Search engine journal post which hit the first page and then slowly started shifting out.
I have also seen this occur on numerous other search terms