It's wrong all the time, and not always because of a lag in updating information. The Republican-appointed ambassador to Slovenia was listed as still an ambassador for months after Obama asked all of Bush's ambassadors to step down. The news didn't make a big deal about that so they didn't get around to correcting it for a while, that's fine. But Wikipedia also makes mistakes about facts that are written in stone, like someone's birthplace. Take Mike Ilitich, for example, a major league sports team owner: for most of the time Wikipedia has had an article on him, his "birthplace had no sources whatsoever, and now that it does cite an external source, it’s wrong!" At the other end of life, have you ever heard of "death by Wikipedia"? I forgive Wikipedia for saying people who have one foot in the grave are dead already, but last week it claimed the young and healthy Taylor Swift had also bitten the dust. I can go on and on.