Is there an inherent difference in how man and women speak that would translate to writing dialogue? I find this hard to contemplate as while I am male, I don't feel that I have found many differences in how the women i have known tend to speak, at least when it comes to dialogue.
Body language and topics and such would and are different, but for dialogue?
To try and give an example, consider a friend comforting another friend over a break-up. Men and Women may try to comfort in a different way, but when speaking about the issue would my hypothetical friend characters dialogue be influenced by their gender?
I'm reminded of a story of an actress replacing a male actor in a big hollywood movie (can't remember which) without any of the lines being rewritten for her, which was not even noticeable.
Is there any kind of established good practice when it comes to writing genders? What is the reasoning behind it, if it does exist?