That may be true, but recognize that just as in income, the quintiles are fluid. My wife (presumably) places me in the top 20% by her fitness function, while someone seeking GQ models for December's shoot wouldn't put me in the top 50%.
Yeah its crazy, all these average single girls thinking they are better than the average single guys, until they hit mid to late twenties. Then they "settle" for someone they deemed undesirable for the previous few years.