Just got my S6 today. It was on 45% out of the box. Plugged it into the "quick charger" that came with it and went to dinner. It was 53% and after 2 hours when I returned it is at 83%. This is quick charging or is it because it's the first time? My HTC M9 with the quick charger could have gone from 45% to 100% in a matter of minutes.