It looks like it captured both players moving their hands around relatively quickly in the menu, but it didn't register immediately. It seemed to measure vertical and horizontal at about the same speed although, because there wasn't much actual navigation, its hard to tell how efficient it will ultimately be when changing options settings.
“When we make some new announcement and if there is no positive initial reaction from the market, I try to think of it as a good sign because that can be interpreted as people reacting to something groundbreaking. ...if the employees were always minding themselves to do whatever the market is requiring at any moment, and if they were always focusing on something we can sell right now for the short term, it would be very limiting. We are trying to think outside the box.” - Satoru Iwata - This is why corporate multinationals will never truly understand, or risk doing, what Nintendo does.
