Why did Nintendo insist on getting the console out so fast?

[palou]

I mean, let's say, launch mid summer. The presentation heavily focused on hardware, 2 weeks before E3, to make sure that people know more is coming. An excellent E3 shortly before launch, with Spla2n, MK8D, Zelda, Arms, and a substantial list of third parties for launch. I just don't see the purpose of getting in early with uncertain reception when so much more could be done just a few months later.