Has information on the popularity of the various log in methods ever been made public? With over a dozen different ways to log in to the various stackexchange sites (Google, FB, Yahoo, WordPress etc.), I was curious what the breakdown was for each of the different methods (most/least popular etc.).
It's been discussed before, though it's been a while since a proper update.
Things have gotten a little more complex as we no longer restrict users to 2 OpenIds*, so remember that when reading these stats. We've also switched from recommending MyOpenID to user's without existing OpenIDs to our own OpenID Provider.
For all credentials in the network (with at least 100 instances):
All credentials used** in the last 30 days (with at least 100 instances):
Although some of the other providers have shifted around a bit, what was true 3 years ago is still true now. Google is used by a strict majority of users (~61% in the last 30 days).
*Actually the old system was even wonkier, as you could have essentially as many credentials as you wanted provided that one was held in common across all your different Stack Exchange user accounts. The original system wasn't designed for the number of sites we now have.
**Our sessions are quite long lived, so logging in and out are actually kind of rare unless you're regularly changing machines.