There's people here devaluing this because "AI probably built this page". To me this is a perfectly valid use of AI; "Hey I got this set of data points, give me a page with these 'extractions'". The page layout is the least interesting part of the page, it's the data points that should be of interest, then again this is where I think the page is lacking.

"1k real browser viewports" (page says 751 data points) tells me it's a quite small sample size to draw the amount of conclusions they draw. Now this is me guessing but I think it might be people actually visiting their site. Probably in the quest for viewport size, this might be why a whopping 6 percent of visitors appear to be visiting with their browser in full screen mode, and almost as many from a device with an 800x600 resolution (I can hear the device owners friend asking "man, what resolution are you running that thing at? Go to this site and check!").

AI report on actual data, not a problem. Low quality data to actually run that report on, now there's your problem.