I read today that the ship had several citations , one was for a watertight door that didn't work. So it is possible they were either underplaying it for the media or it took on a lot more water thaan it should have.
I think it is a tad ironic though that the passengers were obviously environmentally aware- since that was the whole point of the trip.. and they instead ended up being on a ship responsible for a 180m oil slick.
At least everyone is ok.
Carnival Fantasy 6/05
RCCL Sovereign of the Seas 4/07
RCCL Navigator 12/07
RCCL Navigator 11/08
RCCL Liberty 7/4/09