I don't know if it's true across the country, but I a lot of the ads on TV here are very ethnically- and LGBT- friendly.
There are a lot of black couples, Hispanic couples, mixed race couples and mixed race families, e.g., a white couple adopting children from China or adopting black children. I've also seen TV ads with Lesbian two-bride weddings. There are also ads celebrating women, no matter how they look.
It would be nice if the advertisers started normalizing T people by including some in their ads. Wouldn't it be cool to see two women shopping from behind, but when they turn to face the camera, one of them could be clocked as CD/TG?