Although it is cool that they have this so quickly I would have expected a week before it's release as that is usually the case with new ubuntu releases on linode.
My best guess is that they have be mucking around with the RC to make sure everything is working properly and did some final checks once it was released and threw it up on the site while the other hosts actually waited until release.
My best guess is that they have be mucking around with the RC to make sure everything is working properly and did some final checks once it was released and threw it up on the site while the other hosts actually waited until release.