So you're comfortable speaking to older women because they are more mature basically?
It honestly depends on the girls personalities that you're talking to, not all are the same obviously. For me I feel like I'm much older mentally because I've been through so much and a lot of my friends are either a lot older or mentally aged themselves.
I find it easier to talk to most males than I do females, and the females I do get along with are usually lesbians even though I'm straight. Not sure why. That and autistic girls I'm fine with.
Maybe you're just used to being around people who are easy to talk with more than it just being a young female gender thing.
_________________
The term Aspergers is no longer officially used in the UK - it is now regarded as High Functioning Autism.