Modern web pages get me on this every time - I filed multiple bugs on our new site because there was so much whitespace that I didn't realize there was more content below the fold.

I suppose this has made "above the fold" more valuable, or perhaps mobile devices show so little content that everyone has to scroll ...

I just realized that the "mobile-first" web has made using a computer with large screens a super-power. I have 17m pixels (and many more if I wasn't using Retina-like resolutions to get crisper text) - others I work with are stuck at barely over a million pixels.