This is a beautiful piece of data re-interpretation. A few years ago, there was a report published about a compound which supposedly demonstrated the only instance of a solution O-H...F-C hydrogen bond. This seemed to provide some support for hydrogen bonding involving fluorine.
Now a Spanish group has published a nice paper in CC that provides a refutation and re-interpretation of the data that along with some calculations, indicates that the observed data is not due to a C-F...H-O hydrogen bond, but simply due to steric hindrance that makes the three fluorines of a CF3 group non-equivalent. In the former interpretation, it was assumed that the non-equivalence of two Fs of this group with the third F indicated that the third F was involved in hydrogen bonding. The new interpretation says that it is steric hindrance that prevents rapid rotation of the CF3 group, and makes the three Fs non-equivalent. Calculations support the interpretation.
Thus, now we will have to look for other instances in which there is bonafide C-F...H-O bonding. Quite a neat piece of careful data analysis supported by crystallography and quantum chemical caclulations.
Another fact mentioned in the paper reminds me of one of the more memorable papers that I have read; Stanford's Eric Kool's demonstration that difluorotoluene- an isostere of thymine in which Ns are replaced by Cs and Os are replaced by Fs- behaves like thymine when DNA polymerase inserts it opposite adenine.
Reference: Is there any bona fide example of O–HF–C bond in solution? The cases of HOC(CF3)2(4-X-2,6-C6H2(CF3)2) (X = Si(i-Pr)3, CF3) Chem. Commun., 2007, 4384 - 4386, DOI: 10.1039/b710304b