In case anyones wondering: This is caused by two images on the page. The hero image is a png instead of a jpeg. PNG is awesome for diagrams and geometric shapes, but really really bad for photos on the web. And the image with the table alone accounts for 2.7MB of page weight. That can be easily reduced to a <100kb (doesn't span the full screen width).

Properly optimizing these two images will likely reduce the load time from 8-15s down to 2-3s.