A New Update from Google?

I was making my monthly report when i saw something new on google search.
While i was searching for my keyword rank, All the posts on the blogs which were made before 2008 were disappeared, were not showing in SERP.
This made a major impact on those keyword of mine which were showing on 3rd-4th page of google.
The topic was on a Bike review and the keyword had some 50-60 views on analytics.
I am wondering if this is also among the updates..
whats your view?

See original post by tanmay.kamath1992