Nah this is 100% bullshyt.
I can only speak for Dallas but:
White men - almost always date white broads on or ABOVE their level. I've seen plenty of fit, Coli approved pawgs with dad-bod white boys. Both will be "average-ish" but she'll be a notch or two ahead. The dudes always have that 6'0"+ Eli Manning, random former baseball pitcher look that white women love.
Black men - always evenly yoked. Either both have the same level of attractiveness OR he's better looking but she's more educated and makes more money. Usually it's two Black people that are roughly the same level. Rare to see brehs dating way down unless he's bumming off her.
Mexicans - love their tortas. They always have a similar "aura." Like if she's a chola then he's a cholo. If she's a Marisol, then he's an Edgar. If she's professional, buttoned down Latina....he's the male equivalent. She'll be chunky but pretty, he'll be normal sized but average looking.
Indians - women are always the same or better looking from what I've seen...but this is when they're young. Once they get over 50, it evens out.
East Asians - the women date down with white men but date "on level" or higher with other men. Asian dudes that pull women usually got a baddie. Rarely see an Asian breh pulling below his level once he got his STEM degrees and paper on point.