@taber, congrats! I saw this movement from beginning of january. Weekly more traffic. We recoverd to a -30% traffic flow. Very good convertings, low bounce rate, good click through rate, many fetched pages by user. We got back our strongest keywords. Feld like in old days. Than bam on 15 april we are back to july/november rankings. -50% compared to pre penguin/panda 2012. Mostly unrelated foreign traffic. Since we get lots of referals from .ua and ru. We changed: Nothing.
Whatever panda/penguin loˇks for is not good content related.
So nothing sticks these days.