It is slightly disrespectful, but he probably feels he can get away with it since he was once in the club.
Jabbering women is a stereotype, but one based on some truth. I personally don’t like jabbering. But I also don’t have a problem complaining about what men do.
Women don’t gossip more than guys do. I believe this is a myth. But they do tend to talk more about mundane details (like what they ate for breakfast…the color of their baby’s poop…how horrible it is they broke their nail…their hopes and wishes and aspirations). Guys can talk a lot too, but not about stuff like this.
He could have said it in a more diplomatic, light-hearted way, like “Testosterone has made me realize just how much women like to talk!” But being a person famous for being the child of two celebrities doesn’t come with a silver tongue.