TLDR Tech / Dev
New research: The Core Web Vitals thresholds you trust might be wrong for your site
Google's 2.5s “good” LCP threshold comes from aggregated data across millions of sites, so it tells you nothing about where your own users actually start bouncing. Across ten major retailers, every single one hit its best bounce rate somewhere between 100ms and 1 second, well before that line. Four of the ten had already flattened out onto the performance plateau before reaching 2.5s, meaning they were technically “good” for Google while having stopped gaining anything from speed a while back.
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