I can only concur. Nine times out of ten, when some girl really gets to know me for me, I get treated entirely differently.
They're more ready to hug, share, and compliment. They're visibly more at ease and verbally more relaxed. When they think I'm "just a dude" they treat me as such. They act like I'm after their vagina and that I don't care about feelings or ideas. When I defy their expectations, I'm treated like I'm diseased.
However, that's honestly just another brick in the wall. Gender definition and expectations. Some people accept our definitions and treat us like they think they should, granted, but that's not really saying much. It's just proof that people think they know what we are.