When the Brave folks make their speed claim, it makes me curious if they genuinely don't understand the difference between above-the-fold page render time vs ho

When the Brave folks make their speed claim, it makes me curious if they genuinely don't understand the difference between above-the-fold page render time vs how long it takes for the spinner to stop spinning. Maybe they understand the difference but prefer to point people at the spinner because it's easier for them to make changes to stop the spinner sooner. Last time I watched one of their speed comparison videos a few months back, it had several examples where their browser was actually never the first to render the useful page content, but was usually the first to stop spinning the spinner in the top of the UI (which, naturally, is what they choose to measure and report).