I think familiarity has a lot to do with it. He was trying various gestures to get the Win8 tiles to move and select. He mentioned that you should hold down and

I think familiarity has a lot to do with it. He was trying various gestures to get the Win8 tiles to move and select. He mentioned that you should hold down and drag to move a tile, but what I gather from other demos is that a swipe down on the tile selects it and a long swipe down moves it.