Well, I guess the Comments below the article are the best proof, once they think they're anonymous, they post the crappiest stuff... Actually I kinda don't know why people in the web suddenly loose their manners, i guess that would be a reason to make you give your real name everwhere...

I personally don't belive, that Twitter is going to die. The short feeds are just pretty good for promoting stuff, thats why buissnesses love Twitter. But yeah Google + will most likely eat a bit of their Traffic.