^Gamestop is not a source for anything, whatsoever. I can garuntee you that they've been wrong on 5x as many things as they've been right. Nintendo said it would be released in Q1, that would be anytime in the spring, and if they had a release date than they would have announced it at E3, or they would have atleast announced it as being released in early January. They also said that the WiiWheel would be packaged free.
Perhaps you need to be reminded that Gamestop is the one that announced Brawl, Galaxy and Corruption being released with the Wii, then on 3/1, and then on 6/1 and then on 9/1 and then there correct release dates. They also announced that Brawl would be online with no confirmation.