Forgotten password systems are supposed to use challenge questions to authenticate the user before resetting the password. (Of course, those same sites often provide a way to reset using challenge questions and without an e-mail confirmation, which is how celebrity accounts get compromised)
As do I. But I would love to see the stats on the active account (used by a real person) vs active account with 2-factor ratio on GMail. I'm willing to bet the takeup is fairly low.
As I mentioned elsewhere in the thread, I missed the password reset link point. I stand corrected.