I'm having a hard time understanding why he thinks Xanga wasn't a success. He worked on Blogger as well, both of those sites are huge still, maybe not Twitter huge but they are big.
Though blogger was a big hit he wasn't the founder/co-founder of it. Evan Williams was credited with 100% success of blogger. I am not sure about his association with xanga though. But with Twitter he gets an equal footing. That's what I think he is referring to in this article.
That's true he doesn't say they weren't successes explicitly. He does say that it took 10 years to make you look like a succes in the last paragraph which I understood as the other sites not being successes to him.
