  Opthof and Leydesdorff [arXiv:1102.2569] reanalyze data reported by Van Raan
[arXiv:physics/0511206] and conclude that there is no significant correlation
between on the one hand average citation scores measured using the CPP/FCSm
indicator and on the other hand the quality judgment of peers. We point out
that Opthof and Leydesdorff draw their conclusions based on a very limited
amount of data. We also criticize the statistical methodology used by Opthof
and Leydesdorff. Using a larger amount of data and a more appropriate
statistical methodology, we do find a significant correlation between the
CPP/FCSm indicator and peer judgment.
