It seems that everyone is talking about this at the moment.
Google would appear to have got super addicted to providing fresh content, that it is ranking the newer sites higher than those with most authority. Why? I have no idea. Everyone is just taking the black hat route of making more sites, newer sites that can cheat the system for now, until Google packs up it's ideas and changes the algo.
I mean look at what has happened this year with updates, everyday is an update. I think we need to hold tight for the storm to settle and wait for everything to stabilise. Google can't keep this up for long, the SERPs change everyday!