Apple appears to be making slow and steady improvements to the App Store experience. Overnight, Apple added a new feature to the App Store customer reviews that separates user reviews based on version number. This means that steady improvements to applications will reward the developers with progressively better review scores.
In the past, poor early reviews could have dragged down the average score for some time to come. Now, we don't want this to encourage pre-mature releases, but it does offer more incentive for developers to keep improving their product.