Please note that 'very large' was indeed quoted directly from the paper.

"The average difference for the 14 subcortical volumes was d = −0.70. A set of Bayesian t-tests (see Supplemental Materials and Table 1) confirmed that the mean sex differences were very large, with extremely strong evidence in favor of the hypothesis that males differed from females "on every overall and subcortical volume."

You add that in your personal opinion the difference is 'not very large'. What should be the magnitude of the numbers below to fall into the 'large' category in your assessment?

Quote: "...total brain volume translates to 92.1% of males being above the female mean and an 84% chance that a randomly-chosen male will have a large brain volume than a randomly chosen female" That's pretty significant in terms of means.