Holy cow, what a terrible website. Hijacks the back button, scrolling is so over-sensitive as to be useless, the left and right perform in non-intuitive ways, and the animations all have a delay before they start.
Further, scroll a few pages using your scrollwheel, then press the right key. You'd expect to continue to the right, but instead are scrolled all the way back to the left to page #2. Eesh.
What an excellent, approachable summary of the results of the experiment.