As of 2:55pm Central time on 2/15, the BBC on the Heartland documents: "All the indications are that the documents are real"

BBC News - Openness: A Heartland-warming tale

The institute hasn't yet confirmed the documents are genuine - but equally, it hasn't said they're not, and it's had long enough (more than 12 hours, at the time of writing) to take a look.

All the indications are that the documents are real - which gives us an unusually frank look into how lobbying against action on climate change actually works, and who funds it.