wikileaks hadn't a hand in revealing the IOR scandal.
and the article's author doesn't seems to be guilty of bad journalism.
actually, you may be guilty of superficial reading.
the article states that wikileaks revealed secret diplomatic cables about many things : children abuse in Ireland, vatican's relationship with Hugo Chavez, Vatican's position about climate change or about the Da Vinci Code, etc.
but nothing about the IOR and money laundering.
that's two separate issues.
with two different sources.