> And it has been applied quietly - no one (outside of Google) knew about this massive change in activity until this blogpost
Only if you weren't paying attention. They've been discussing testing it on Google's servers like they did SPDY for a long time now. The first announcement I can find that they were switching some Google traffic over to it was almost two years ago[1], and if you're on blink-dev or chromium-dev (or proto-quic, if you're serious about it) you'd have gotten periodic updates on the topic. Youtube videos about it[2] (with discussion on HN[3]), etc etc.