“We are not going to distribute this material, considering the proprietary nature of our processes and the intellectual property rights that exist.”

The fact that they are going to making independent verification impossible makes me highly highly suspicious. Most scientists I know in their position would be sharing the material widely (even ahead of publication) to have replication from other parties, to bolster this claim. Until there is replication, I trust NOTHING from this group which has outright fabricated data previously.

Extraordinary claims, from those who have previously faked data, require independent third-party verification.