Xbox has confirmed that the Xbox Series X|S boot time just got a little bit faster, by about 4-5 seconds to be precise.
This has been confirmed by Josh Munsee, Director of Xbox Integrated Marketing who confirmed that a shorter boot animation is now being used to reduce the overall start up time and take it from 20 seconds to around 15 seconds.
Obviously, this is only the case in the Energy Saver mode where your Xbox Series X|S will fully shut down every time you turn it on, with the standby mode having an instant on.
This has been demonstrated by The Verge’s Tom Warren, who has showcased the new faster boot time.