Huh. I saw no such tutorial on either my desktop or the Surface. The Surface just gave me a "swipe up to get started" animation and that was that. I was at the Start menu.
So I guess I avoided it by not seeing it at all.
Once you know it--the close swipe--it seems obvious enough. But just randomly swiping this way and that, I didn't stumble upon the long-swipe-from-top, which is not to be confused with the short-swipe-from-top which opens the context menu at the bottom of the screen.
