@freemo Oh, it's not exclusive to gay men. There are straight men who use that voice. Usually, they are referred to as "metrosexual". It's just that straight men have *significant* societal pressure to speak "normally" if they want to ever get laid or be employed, whereas gay men have the opposite incentive (at least for the getting laid part). I truly believe that *every* man has that voice inside him... just a matter of how close to the surface it gets.
As for the thing about trans women: many of them are seeking, above all, to fit in as their new gender, so they tone a lot down. But there are absolutely women (cis and trans) who are every bit as catty as the gayest men. Just watch any reality show on TV, lol.