Xbox One day-one update will take 15-20 minutes
When you purchase an Xbox One on November 22, expect to set aside a little time for the console's launch-day update to install.
"We are optimizing Xbox One so that the day-one update is as fast as possible," Marc Whitten, the Xbox One chief platform architect, told IGN. "While we’re still finalizing the details, we expect that the download will take between 15 and 20 minutes for most users."
Considering how long we've waited for this next generation of consoles to roll out, 20 minutes is a short wait.