I think you're mixing two issues here. There is the sibilants issue which theoretically should apply to both female and male, and there's the 'tizzy' issue which seems to be from female vocals. I can't really speak about the tizziness because since doing the jergpad mod + eq I don't hear it anymore, but it's been mentioned a lot in the past in this thread.
Can you explain the difference here? Sibilance vs. tizziness?