Where are you located, if you don't mind me asking?
I'm a darker (browner/darker) woman, and I've dated both. I hear this, and have even seen it, but my experience has not been that one or the other likes me more. I think those that have a strong preference don't date what they don't want to date.
But I have noticed that most of the guys I've dated have had that "pretty boy" look (light or dark).
I usually get a tall, dark-skinned, beautiful complexion (hershey kiss skin) guy with a bald head or a tall, light skinned boy with beige, honey, or caramel skin that's crystal clear and usually bald or close cropped hair. Some on both ends of the spectrum have light eyes, some don't. I guess we can't determine who we attract, they just come to us???