Well i do hope the best for you, but i feel you might just had a happy panda and maybe the next one will be angry!
I worked to raise user metrics on my site since a year, and my hard work resulted in double "time-on-site", halving "bounce-back-rate".
In 3 pandas (in August till November) i've been rewarded, i've been given total of 30% boost, i was like hapy as ever, only to lose 50% of my traffic on the 17th of November and i'm down since... So now i'm just clueless. My visitors like my site, no doubt, but google does not.
After 3 happy pandas, came the angry one taking away more than all 3 had given me before.