You'll see in a few days that you're wrong. PacMan took about a week before it was fixed server-side. Fruit Ninja took more like 3 days. It's happened with every single Xbox Live release at their initial launch. The reason you don't notice it usually is because you don't actually see games in the Store immediately; they only show in new releases a few days after launch, despite being present (and searchable) in the Store. Because you already had Cut the Rope installed, you got the update to the Live version as soon as it was approved in the Store, in this case.
You don't have to believe me, but it's been the same way for every other Xbox Live game.
Edit: And... I was incorrect in this case- see below.