I've played 12 games, and won 5. The game claims I have 3 wins. The games I won were with Pharah, Widowmaker, Mccree, Reaper, and Hanzo. (Though it says I have 0 minutes played with Reaper and Hanzo, so apparently those games didn't get recorded...). I haven't played any character twice yet.
Here is my games won statistic:
I can guess the numbers mean number of wins... but what do the bars represent?