OKCupid shows you the last time they logged in, and I've checked with a dummy account and it's off by 10-15min at most. I've also chatted with a couple, so the

OKCupid shows you the last time they logged in, and I've checked with a dummy account and it's off by 10-15min at most. I've also chatted with a couple, so there is definitely a real person at the other end.