I think that's just a misunderstanding on the part of the website.
As I posted in the other thread, here's the direct quote from Iwata during the conference:
"In order to fine tune Smash bros, with this unprecedented game depth, we have decided that we have to take a little more time to complete the game than we announced before. We are sorry for the fans that are already anxiously waiting for the launch, but we would like to launch this game on January 24th, 2008 in Japan. As for the North American launch, we will review that too, and our local subsidiaries will make their own announcements."
You can see the full dubbed conference for yourself at:
http://www.irwebcasting.com/071010/53/f078bbc3f8/main/index_hi.htm
The talk about Smash Bros starts at around the 40 minute mark.
Edit: fixed link (i think)