“ChatGPT以後”に公開のWebサイト、35％がAI生成に？　米スタンフォード大などが調査　広まる「不自然に明るい文章」

English summary

A Stanford-led study finds roughly 35% of websites launched after ChatGPT contain AI-generated text — detected via tell-tale 'unnaturally upbeat' writing styles. The data illustrates how fast AI-generated content is reshaping the Web, with implications for search, SEO, and content-quality evaluation.