I'm going to forward all you neckbeards to this article
Authenticators HAVE been on the bad end of a MITM attack. It's happened before, and it WILL happen again.
Maybe you guys shouldnt browse MMO Champion and Diablofans every day. Seems like there is some distributed Malware on those sites on a DAILY. BASIS.
The article you state actually presents a valid reason why this is most likely on Blizzards side rather then a man in the middle attack:
A Man in the Middle attack needs to be done in real time with a large amount of timing and accuracy.
How did 100s/1000s get hacked at roughly the same time via this method?
P.S. I have never visited either site you have stated, ever. Nor do I visit any other fan-site. My typical sites include cracked.com, reddit, cnn, yahoo sports, engadget, etc... This comprises like 99% of my daily web browsing.