Right now, the animateAnchor option waits for the load event to get triggered (since FP v2.8.0), which can take a while when using heavy media files such as images or videos.
This was done this way because fullPage.js in the past relied on a third-party component to create scrollable content on the sections (slimScroll). But because it's not being used anymore, we can probably get rid of this behaviour to speed up the scroll to section on DOM ready.
Related with #2959 #1982