Informal survey on one of my sites... last 50MB of access log, IP unique (multi loads from same IP & referer ignored)
1. Referers that start with http://www.google -> 1391 (46.3%)
2. Referers that start with https://www.google -> 1609 (53.7%)
3. In addition, 39.5% of the https:// referers do contain variables (not stripped by the browser)
So it's certainly not "all" google search being encrypted as the article suggests. A total 64% of all Google referers are still showing keyword data.
