I've never experienced it either, but maybe it's regional influence.
I've worked on a lot of teams over the years, often as the only female on a project. Only once have I felt in any way "different" from anyone else on the team, be it in a positive or negative way, and I don't think that was intentional. It was a startup ran by young, single guys, and I was a mid 30's mom. We just had different priorities and interests and the culture wasn't a good fit. But there wasn't anything negative or sexist about it, just differences.
I've worked on a lot of teams over the years, often as the only female on a project. Only once have I felt in any way "different" from anyone else on the team, be it in a positive or negative way, and I don't think that was intentional. It was a startup ran by young, single guys, and I was a mid 30's mom. We just had different priorities and interests and the culture wasn't a good fit. But there wasn't anything negative or sexist about it, just differences.