According to Chinese gaming site pcgames.com.cn, Nintendo have hit a few snags in the Wiimote production tests.
Here's a summary translation of the article:
There has been some discussion about the reliability of the article, but no conclusive evidence either way as of yet.The whole article is mainly talking about that there has been some problems with the ‘in production’ wii controller, which resulted that even Nintendo won’t know when is the right time to launch the Wii…The Chinese folks in the factory said that small glichtes with the controller such as an less responsive or less sensative button, some controllers are hard to push two buttons at once, or even no response when the button is pressed. They also said that the shell of the controller is really fragile, and when the controller is used normally, it’ll make wierd sounds when you press down a button. This is just the first hardware test by the manufaturer, when all the hardware issues are resolved, they still need to send it to Nintento in Japan to have a second hardware test regarding to the bluetooth technology with the main Wii hardware.
source: http://www.pcgames.com.cn/tvgames/to.../815722_1.html via http://www.gonintendo.com/