That’s interesting. How have you been testing for it? Are you tracking your own visits as an administrator? Do you have Google Analytics set up to not track visits from authenticated users?
I use Chrome, Firefox, and Safari for different Twitter, Facebook, and Google accounts. I’m going to keep on testing this myself to see if I can spot my own visits as a user who is not authenticated; I have GA set to not track visits on my site for authenticated users.
Let me know if you happen to notice any differences, and I’ll share my own experience, too.