Ok, the percentage is made up, but the layout for Google Page Creator was indeed given a face lift. The layout controls were moved from the left side to the top -- helping users who have lower resolution monitors see everything, and it gives Google more room to add new features in the future.
For example, on my widescreen laptop, which has less vertical real estate than a normal monitor, I was never able to see the "Edit HTML" link at the bottom left corner. It was quite frustrating, but knowing that Google listens to user suggestions, I was confident it would be changed sooner than later. Here is what this page looked like before the update:
From what I can see, this is the only noticeable change made. Are you able to see anything else that's new?