the first picture of a guy from okcupid is really appealing, although it's also the best photograph by far and with good lighting, so that may be a factor. the other 3 would be far more attractive with different "grooming" styles and some exercise, although not to the crazy extent of the "beautiful" guy pics. Third guy is pretty cool-looking actually.
the girls from okcupid are all crappy photos, either bad or no makeup, and not in ideal shape (or at least not showing all their goods). I bet the in-shape ones could be made over to look very similar to the "beautiful" ones, especially with lighting/photoshop. The site is only how beautiful the photos are, not the people.
edit: I guess "beautiful people" is a nicer-sounding club than "no ugliez allowed"