I have the 2010 one, different rear shock but will chip in.
I have found that it takes a bit of riding with different settings to find what works best. I’m sure a lot of it depends on your weight and what you ride, what tyres you use and at what pressure.
Me….Sag 25% and the rebound depends on the ride, if I’m doing something a bit more “downhill’ with jumps and drop offs I will dial it down so I don’t get the rear end kicking up.
Not sure if your shock has the 1-2-3 setting of pro peddle? I leave pro peddle on (2) most of the time if I’m doing XC and flick it off for anything that isn’t up or level.
It’s all personal preference so take your time to find what works for you….and enjoy your new bike!!