The authors investigate sex differences in mean scores and variance, in general and specific intelligence, based on raw data from the standardization samples of six cognitive ability measures adapted and normed in Romania. The results show that fewer than 10% of the possible comparisons exhibit sex differences; these differences have a random pattern and are not replicated across measures. The authors conclude that these Romanian data show no support for the sex differences in either mean values or variance of scores which were reported by other studies.