Yes, it has changed in recent years. More men help out than previously but it is nowhere near a 50-50 split. Change is occurring gradually. I only see substantial change when comparing generations. Women are more participative, consulting, need to discuss in more detail while men are more competitive and individualistic.
Women tend to be more inclusive and cooperative in their management style.
Consensus building is a more common management style with women. In general, women are more people-oriented and frequently are less likely to be empire builders. The majority of women like to get along well with others and please others as they were raised thus. I think the perception is there that they do, but I disagree. It is more a general factor of attitude to life which varies among both men and women.