It's hard to say. In some ways, I feel much more mature, and it's hard for me to believe that some people have a job/are the parents or guardians of kids when they seem to behave like five year olds themselves. But in other ways, I feel as if I've been somehow left behind and am much younger.
... NT people, to me, seem to overreact a lot. Always shrieking with laughter or gasping with shock or making such a fuss about the pettiest things. That seems immature to me. I suppose I'm the 'flat effect' kind of Aspie in terms of emotional display. But then I react strongly or badly to other things that they barely notice.