Page size is part of user experience, however. If you've ever visited another part of the world where Internet is awful or tried to use 3/4G on a mobile with bad signal, you immediately start to hate web sites that take forever to load what amounts to a page of text, which, if it were merely a HTML file containing the text, would still load immediately even on dial-up quality connection or less. Most people don't know this. Programmers do, and people who remember 90's Internet. Taking this into account, comparing against books is not too weird.