Every content guide cites "80% of readers quit after 350 words." That stat traces to a single founder interview describing internal data — no dataset, no methodology, no third-party verification.
If you've been cutting posts to hit a word count, you've been optimizing for folklore.
This matters if you write to build an audience: you have no actual evidence that shorter is better, only a widely repeated assertion from people who also never measured it. Seth Godin, who has published a blog nearly daily for decades: "I don't keep track… I don't know how many people read my blog." 37signals/Basecamp cites brevity as a value, not an outcome. Axios's Smart Brevity framework is real and structured — but the engagement number attached to it is unverified.
The one format with a documented standard for what earns inclusion: Simon Willison, who has published 7,607 link posts since 2003, requires every entry to credit the creator by name, explain why it's worth reading, quote liberally, and "add something extra" so the reader gains value without clicking through. His weekly digest has one hard filter — external links are excluded if they carry no author-written annotation. Raw links don't get in. The gate is annotation quality, not word count.
Separately, the only rigorous taxonomy of what humans actually judge as low-quality writing (arXiv 2509.19163, built from 19 expert interviews) found that "verbose text conveying minimal content" was the strongest consistent signal across all annotators — and that automated tools are weak at detecting it.
The implication: density matters, but the brevity gospel has no data behind it. Write as long as the idea requires. Cut what's empty, not what's long.
Sources: Axios Smart Brevity framework [Tier 1]; Simon Willison link-blog practice [Tier 1]; arXiv 2509.19163 slop taxonomy [Tier 1]; Godin quote [Tier 3, direct].
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