Thanks you, I was only aware of the problems raised with Cooks 2013 paper. I was not aware that new research backing it up. You have changed my opinion.

But I would say that it's worth noting there is criticism of the original paper http://iopscience.iop.org/article/10.1088/1748-9326/11/4/048....

But as I said you've changed my mind, the 97% figure seems to be accurate.