Of course they do, because YOU want them to!
You see, for a woman to want to engage in this activity, she must want to do so. Because she is excited of the prospect and looking forward to it. So when it happens, it's 'better'
You may have two bowls of ice cream in front of you, vanilla and chocolate. The chocolate one was made by the finest ice cream maker on the planet. The vanilla scoop was out of a supermarket cold case. You find you may like the vanilla one better because simply put, you hate chocolate.
Or, using the same example, but reversed. The vanilla was the best ice cream on the planet. The chocolate one was from the cold case. You may REALLY want chocolate, so it's naturally 'better'
Do Blacks fuck better than whites? For me it's a combination of things - he's exciting, well equipped, fun, skilled and in short, just about everything a woman would want. And he's Black. Does HE fuck better? Subjective. I may think so, but the Korean lady in the post above may not like him at all, because he's bald, or because he is tall, or too Black, or whatever.
The term is subjective and if a woman didn't like Black cocks, I doubt she'd be in this forum.