I doubt a 2010 release will actually happen given Nintendo's history with delays, and in all honesty if they want to properly nail everything such delays would probably be for the better.
Nah. This sounds more like this game, too, is adhering to Ninty's "new" policy when it comes to marketing games. Full blow-out, and then the game is due....THE NEXT DAY!
But it certainly sounds like such is fine. They've probably been working on this game since shortly after the last major console Zelda back 4 years ago. And Japan, especially, is HON-GRY for more Wii goodness, after the blockbuster that was NSMBW. Mario Galaxy 2 and Zelda sound like they could fit the bill just fine. Hopefully, such is in the cards for the US and other places too.
But yeah...they're NEVER going to do it like they did with TP and Brawl, ever, ever again. Fanboys ruined it, and the games themselves couldn't live up to the tremendous amounts of hype and pressure. And honestly, I don't mind this. The game is only shown WHEN ITS READY, and we don't have to worry about delays.