When does first win of the day bonus reset?
At what time does the daily bonus reset?
I am personally mostly interested in EU region's reset.
Information from the Beta and around the net would seem to indicate that the First Win of the day does not have a daily reset time (a la World of Warcraft Daily Quests), but rather a rolling timer, 22 hours after your previous win (a la World of Warcraft Transmutation timers).
Unfortunately, there is not yet a way to track how close you are to the counter expiring and becoming eligible again