The end of the thread (from earlier this year) seems to indicate otherwise.

A Google employee addresses this: https://productforums.google.com/d/msg/websearch/1l2KMUfgyo4.... Apparently visiting `nosslsearch.google.com` directly does not have the intended effect, but setting up the CNAME record does.

I tried it myself before making the comment and it did not work, but perhaps that was because of HTTPS Everywhere.