Lorel - 4:40 pm on Mar 8, 2013 (gmt 0)
Here is another idea to consider. I checked my site in MajesticSeo yesterday and noticed that my site has lost a lot of back links in last few months and gained very few (because I've been too busy trying to FIX whatever MIGHT be wrong with my website to pursue that avenue or even participate in social stuff, except on WebmasterWorld).
With all the Panda/Penguin penalties the 2 years (and sites disappearing or their ranking dropping), it seems to me that could be the reason for the downgrade in traffic and ranking, i.e., the whole internet has been downgraded except for spammers floating to the top intermittently. Maybe we are looking at the new Normal.