More inattentive diagnoses occur now, certainly -- I'm one of them. Diagnosed finally as an adult because I wasn't a disruption in my classes. At question is more whether an understanding of initial indicators, and efficacy in flagging both presentations, is equal in parents and teachers.

Obnoxious/hyperactive kids wear on us more than space-cadet/inattentive kids. The hyperactive ones are the squeaky wheel in this case.

(And, interesting choices in your signposting, there.)