> One quantitative test I can suggest -- one can count the number of occurrences of the word 'statistics' in the journals and conferences he has published and compare that with the number of publications he has authored. My sense is that it will be close to 0 and getting closer (if not already there yet).

I'm not sure this "quantitative test" is the best approach... after all, I'm pretty sure "Biometrica" and "Econometrica" don't have "statistics" in their names.