Rig Zone is, at least to my knowledge, a reliable source. Even though they have released based on RE and Range news, RZ is not in the habit of publishing or passing on unsubstantiated rumour.
Size of the discovery is another question, but again, give the overall background to this story inclusive of the geology, the history of Lundins" hot pursuit of this play and the earliler Cretaceous pay zone, this has a lot of positives and virtually no negatives.