Third-parties started working on with 3DS tech recently

“It’s quite recent, in general. As we explained, it’s very important to us that we have their support and all the Nintendo teams have been dedicated to our partners and spend the time with them. What is important is the surprise effect that the 3D can give on the screen, it was one of the best tools to convince publishers to work as soon as possible with the hardware. They wanted to get hold of it immediately.” – European managing director of marketing and PR Laurent Fisher

It seems like a lot of third-parties were able to accomplish an awful lot in a short time span. I just hope that a number of announced titles will be finished for the 3DS’ launch.

Source