Maybe there is a difference between countries, but the dutch sites are doing reasonably well. Finding/dating keeps on being frustrating, especially for the /. crowd since, well, this is not the sort of people adept with the best communication skills, so when using those sites my feeling was also that most other subscribers was too high demanding. But it worked in the end, also for a number of my family members (also non-tech females) and quite some friends.
And there are a lot of females too using it seriously and, although initially too high demanding, have come down to more realistic perspective. And it has become more widely accepted.
Is there a difference between countries (no US vs EU bashing intended)?