I should have been clearer, sorry.
By professionally dxed, I meant that a doctor of some sort (or therapist or counsellor) has said that they believe you have it, even if they didn't officially write it down. I'd consider everyone who's explained here (makuranososhi, kissmyarrtichoke, zen_mistress, and bhetti) to be professionally dxed, at least for this poll. I specified professionally instead of simply diagnosed because I didn't want something like, "Well, my parent/sibling/best friend said I fit it" or "Well, I just know" to be counted as a professional dx for this.
Buryuntime - yeah, I suspect that's what's happening, because there's an obvious skew showing. There's also a pretty obvious skew towards professionally, to the point where I wonder if people who are self-dxed are choosing not to respond. Of course, polls here are going to be far from accurate, but still.
Bhetti, I don't know how schools work. Our "mental health" cousellor was very into the new age crystals and lunches where you had to sit with other students in her office (to "get to know each other better") and whatnot, and everyone considered her to be a joke; that was the closest thing we had to mental support in school. I was officially diagnosed at 17, but that wasn't connected to the school. It'd be interesting to find out the percentages done in and out of school, but it's not something I know anything about.
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"Nothing worth having is easy."
Three years!