300ms is a good target for a page load, not for a pointless animation. And that's a 3MB gif. The page also contains a 2.6MB one, two 6+MB ones and one over 7MB. The entire page is over 30MB. Scrolling through it takes the sort of bandwidth typically used for a high quality streaming movie. At 1 to 2 MB/sec you can easily miss something is an animation in the first place because it won't have time to load. Of course, you're not really missing anything other than a low-fps repeated distraction you can't choose to start or stop. This is a good user experience the way a fresh pile of manure is warm shelter.