I'm 100% sure it's the GNex announcement that crashed Twitter. Think about it, all the interlinked people following tech news and then, BOOM! HAHAHAHAHA! #VZWNEXUSFAIL :-$
Yeah. The "geek phone" that "most people that aren't developers" don't want is so popular it crashed one of the biggest social networking sites on the internet. I think people need to rethink what a nexus phone is THESE days without going all the way back to the nexus one as a point of reference. It's not the nexus one. It's the beginning of an era where android is finally known as a polished os that has what consumers want.