I have recently bought a 2016 30kwh S model (12 bars / 91%SOH) with 25.600km on the clock. Software has been upgraded by Nissan when I bought from dealer. Got the documentation showing improvement after software update.
This is the 3rd week I'm using it and did an experiment.
I have charged the battery to 100% and drove in ECO mode all the time, A/C off all the time.
The range on the dash showed 191km at 100%.
Yesterday before charging it again I had drove 192km and still had 13% of battery remaining (~27km).
I could have driven a bit more before charging, and think the way I drive I could have easily passed the 200km mark.
I'm in New Zealand and driving mostly on flat. Around 80% flat surface and 20% small hills.
Hope it helps. Cheers