Minor aside, but why is every site into the delayed loading of items while scrolling. I glance down and see a two item feature list and then plenty of white spa

Minor aside, but why is every site into the delayed loading of items while scrolling. I glance down and see a two item feature list and then plenty of white space, scroll down a tiny bit and suddenly the feature list grows. Just show the list on load so I can see there's more to the list at the end of the page. Seriously, what benefit does this provide?