Looks like PM is a bit behind with the news. Quite a bit of discussion about this a while ago.
2014:
http://www.cruisersforum.com/forums/...ne-122992.html
and a long thread discussing it from earlier this year:
http://www.cruisersforum.com/forums/...er-182700.html
Edit: First comment deleted

I see they are reporting on a recent paper which has come up with a slight advance on the previous discussions.