I'm guessing that of the 4,600 new hours of speech, maybe 4,100 of those hours are of men's voices and 500 hours are of women's voices, yeah?
https://commonvoice.mozilla.org/en/datasets
The ratio of male to female tagged voices in the English dataset is 45 percent male to 15 percent female. (The remaining 40 percent is untagged.) Odds are good that the ratio is closer to 75 25 than 50 50, at least by hours of recorded audio.