Ilya Grigorik from Google, he is the man there obsessed with speed, SSL and mobile, has shared some interesting stats on the adoption of HTTPS across the top 300 sites on the web.
(1) HTTPS adoption for the top 300K sites has grown by 300%+ over the last two years, from 4% to 13%.
(2) In Chrome, the number of HTTPS navigations has grown from ~27% to ~58% within the same period of last two years.
Here is the chart Ilya shared:
Still, while this is good news, Google's goal is for the web to be 100% HTTPS.
Forum discussion at Google+.
