Major nelson reports:-
In its first week, 108,000 unique Twitch users tried their hand at broadcasting from Xbox One, accounting for 22 percent of Twitch’s unique broadcasters in the same period of time
To put that in perspective, according to Twitch, it took another console a month to achieve what the Twitch app on Xbox One did within its first week.
According to Twitch, “Titanfall” is the most broadcast game on Twitch on Xbox One, with members streaming more than 10 million minutes of the game from Xbox One to date.
I haven't streamed myself yet, but i have watched a few channels. impressive stuff.
Go XBOX !