I'm pretty sure at some point they stated that you would not have to buy anything extra for GW to work on N3DS. At this point I feel it is safe to say GW lied to some degree. They have a working method, but it is not what the were saying it would be. People who purchased a GW based upon what they were saying "All you need is the GW cart" were lied to. They have no method beyond the OoT one that they would release publicly, that is clear now. It just took them months to admit it.
They only did it because they were loosing sales and this was the only option since the official release doesnt seem to be near. But hey better this than nothing right? WRONG! At least for some people
The fact that they released this to the public shows that they indeed care for their customers unlike someone else khm... All in all Im happy they released this method to the public since Ive got some friends with OOT who I can borrow the game from.