In the past all companies have made them longer, I mean Sony was terrible at dragging them out.... but complaints have told them to shorten them, have less talking and less waffle (just look at the EA one today, so much waffle).
Now MS are in a slightly different position as they are promoting new hardware so you have to talk. If I was them, would get the talking done at the start, even if its 30 minutes with small teasers.. then just games games games.








