A couple of reasons girls on dating sites can appear a little above their station:

1. They don't realize that a lot of the guys contacting them are interested in one thing, thus it inflates their egos because they believe there to be a lot of men who are willing to date them, when in fact this is not the true picture. There are a lot of guys that will stoop them. but would NEVER have a relationships with them. I've seen it time and time again where a woman who is a 6 on the scale of pure physical attractiveness, has sex or is pursued by a guy who is a 7-8 who simply wants sex, but nothing to do with her.

What happens?

She starts to think she is a 7-8. So she reasons that she should be looking for a 7-8 and ergo she is single.

2. A lot of these woman have spent the better part of their twenties blowing their money on travelling, having rampant sexual encounters and now have used and abused their bodies and hit debt hard and are ready to settle down with some poor sucker who clearly is getting the leftovers.

These women also have an attitude of "me, me, ME".

They think they are entitled to a guy who is better looking than them, has more money and actually planned his future and will thusly absolve her of her bad decisions.

Go to any dating site and it's hilarious. These women are so used and abused, but their list of demands are absolute fantasy, especially when point for point they fail to live up to any of the actual things they want from a partner.