Yeah... That article was really disappointing. You would've thought that Jehovah's Witnesses would be most eager to prove Jesus' existence, but in reality, they barely even scratched the surface. What really annoys me, though, is that Jehovah's Witnesses are all happy now because they think this is all the information needed to conclude whether Jesus existed. And when you try to explain to them that this article is not enough but is just too simple, they automatically call you a dangerous apostate who opposes the Governing Body. Their ignorance can at times get to you. They don't know how many facts they're missing, yet they claim to know everything about the subject.
By the way, I believe they also had one quote from a non-historian as evidence of Jesus' existence. It might have been Einstein or some other scientist. Basically, their argument was that since a smart atheist believed Jesus existed, he must have existed. The article was no doubt written by a fool with access to some type of mini-Wikipedia.
Edit: Just checked. It was Einstein's quote. And he wasn't an atheist but a pantheist.