34 months and 10 days, and 26,435 miles for me. Effectively I probably lost that bar at the end of the last (and very hot) summer, as that top bar would disappear very quickly. I was also noticing that occasionally a 100% charge would only yield me 11 bars.
Blue Ocean 2012 Leaf SV, lost that 1st bar at 34 months/26,435 miles. Lease returned 2 months later. Final LeafStat figures: 225 Gids, 17.44 kWH, SOC 91.89%, SOH 82.36%, 69.49% HX, 54.57 Ahr, battery temp 61.8 F.
Now driving a 2015 VW eGolf SEL.