Arrington notes at the bottom of the post that this WSJ article was published after the TechCrunch article and "was supposed to be published earlier this week, and wasn’t". He goes on to say (and it certainly seems likely to be the case) that it probably would not have been published at all had he not written this post.
Another explanation is just that the article was going to be delayed for some non-sinister reason. Then WSJ pushed it out the door in response to the TechCrunch article because, had they published it in (say) a week, it would have looked like they wrote the whole article to answer TechCrunch (as opposed to now where is just looks like the released it to answer TechCrunch).
http://online.wsj.com/article/SB1000142405270230373850457556...