Here is a statement from Niki Christoff, Google's Director of Corporate Communications:
The revelations of this past summer underscored our need to strengthen our networks. Among the many improvements we've made in recent months is to encrypt Google Search by default around the world. This builds on our work over the past few years to increase the number of our services that are encrypted by default and encourage the industry to adopt stronger security standards.
Honestly, I thought Google's secure search was default globally already based on my 93% not provided count. But I guess, it will soon be 100%.
Yes, as Google defaults all search to SSL, it will stripe out the referral query data and marketers will lose out as well. Most don't care if it goes global because most have already lost 90%+.
But we are eagerly awaiting what Google is going to announce with the upcoming not provided changes.
Forum discussion at WebmasterWorld.