Someone have a before and after? Maybe I just don't spend enough time on apple.com, but this looks the same to me, except maybe a different color on the menu bar.
When I load the "Mac" section, the icons for the various models of Mac sort of spring outwards to fill the scroll area.
Clicking on any of the other categories on that page (like Applications, Accessories, etc. result in a offloading of old icons + reloading of the new category icons that includes the same spring/jiggle.
Also, when I go back to a previous page, like the main page, the navigation bar animatedly drops down from nowhere on page load.