I think it is very plausible that they don't use NMR structures here, but I was looking for a specific statement on it in the paper. I think your guess is plausible, but I don't think the paper is clear enough here to be sure about this interpretation.
Yes, thanks for calling that out. In verifying my statement I actually was confused because you can see they filter NMR out of the eval set (saying so explicitly) but don't say that in the test set section (IMHO they should be required to publish the actual selection script so we can inspect the results).
> Input mmCIFs are restricted to have resolution less than 9 Å. This is not a very restrictive filter and only removes around 0.2% of structures
NMR structures are more than 0.2% so that doesn't fit to the assumption that they implicitly remove NMR structures here. But if I filter by resolution on the PDB homepage it does remove essentially all NMR structures. I'm really not sure what to think here, the description seems too soft to know what they did exactly.
