There are millions of things that apply to how people communicate, sex is just one of them.
Other things that also might apply is,
- upbringing
- family values
- personal values
- area (geographically)
- knowledge of the other person
- stereotypes even down to labels ( like a "goth" female would talk differently to a "prep" male than another "goth" male, stereotypically if at all, ect.)
- age
- interests
- whether they are introverted or extroverted
I'm very likely missing quite a few.