Our speaking pitch is far from a simple biological thing, its very much culturally proscribed. For example, I notice that many women born in South East Asia (I grew up there) speak at a /much/ lower pitch than Americans with SE Asian ancestory.
I suspect that owing to mass media, the culturally proscribed "ideal pitch" (barf) for women has been going up, as it signals greater "femininity" on the heterosexual scene (since, on average, men have longer vocal folds, and thus lower pitch). As mass media sinks in, NTs tend to very much emulate dominant trends and patterns...
I suspect if anything, NT women may have an artificially over-accentuated high pitch, compared to female Aspies who may be speaking with what's biologically closer to their 'natural' voice pitch.