I am using the iPhone authenticator and have not had problems as of yet.

Obviously, I wouldn't have expected problems after 2 weeks but...

I am noticing weird issues with the Battle.net accounts though. For example, I was trying to log on today and noted that the non-B.net account got logged on right away. The B.net accounts had to wait for about 10 minutes longer because the login thought my server was down (Bronzebeard). Once I got logged on, no worries. Still, was a little bit odd.