I'm sure people will reply saying their DH is way more attractive than them, but in general I do think this is true.
I know attraction and looks are completely subjective, however where there's a difference it's often that the man is more powerful/wealthy, e.g. Boris Johnson, Nicolas Sarkozy.
When referring to attractiveness, it's not just in looks but in salary, skills, talents and so on.
Honestly I rarely see a very beautiful, high-earning, successful talented woman with a man who's very average-looking and a lower earner or less going for him, even if he's kind or whatever. Nor do I see it the other way round.
Feel free to correct me if I'm wrong. I was speaking to a male friend and he told me he wouldn't date a woman who he considered out of his league as he'd feel threatened and insecure.