Just as a data point, we have two 2016 SV's, both purchased at the end of May 2016. One was manufactured 10/15, and the other 1/16. Both have followed the same trend with SOH are are about at 91 and 92% respectively (the cars read 98% and 96% at delivery and dropped to about 92% by October).
These cars also spent the winter over the last six months in "cool storage" in the Pacific Northwest while we wintered in Phoenix. Both LEAFs were left at 60% SOC, unplugged (although 12V de-sulfating battery minders were connected). Upon return, we found the LEAFs had only lost 1% in SOC. Interestingly, SOH readings on each are the same as before storage and holding more or less steady. We'll see what happens this summer.
Edit: I should add we generally follow the recommended charging advice in the manual. Primarily that means avoiding frequent topping off and avoiding letting the car sit for extended times at full/empty charge. We tried to implement a Stop-at-80% using a Raspberry pi and the OpenEVSE network interface by detecting the start of taper, but that ended up stopping the charge at 97%, which didn't really seem worth bothering with. The 2016 manual still recommends using Long-Life Mode (80%), even though the option had been deleted from the US models.
One last data point: my car at 92% SOH recently consumed 27,283 Wh from VLBW to full as measured at the 40A EVSE. The last time I did that test was 7/7/16, and consumption was 28,441Wh when SOH was 95%. Interesting. One variable is environmental temperature of mid 55F vs. mid 70+F explaining some of that.
2016 LEAF SV