Hi http-archive team!
I read in your FAQ that you test the webpages on your private instance of WebPageTest. Then I tried out the public webpagetest tool with some pages of which I know that they use lazy loading on images and found out that webpagetest doesn’t recognize this and only counts the bytes of the images “above the fold”.
So, how about your results? Do they include lazy loaded images?
I found this statistic: State of Images
It states that currently 10% of webpages use lazyloading, with a large rize since July 2020.
In case your stats do not include those images, the figures (e.g. median page weight) might get biased if more pages use lazy loading.