In the UK we view things differently. Here the D in GID stands for Dysphoria not Disorder. It's a big difference. As for the wider trans community, I've yet to find any meaningful research which adds anything to Hershfeld's efforts. Any dual-role gender variant person who ends up needing psychiatric care is likely to have mental issues separate from their gender identity and so are not representative of the wider trans community. But for anyone who wants to stigmatise trans people rather than understand them those patients make very good ammunition.