I think recent history would invalidate the findings. Not that the findings were wrong, just that society has moved beyond this notion.
LE routinely determines, now-a-days, that a shooting in the home is justified when the 'homeowner' raises the self-defense justification, and there is few if any evidence that contradicts the 'homeowners' justification. Subsequently, it rarely gets to a jury, and when it does, gender rolls are not likely to come into play. It is 2012 and most folks have gotten past the premise of the study in my opinion.
Was there not a story recently of a young woman who did such a thing? Made the national news if IIRC.