Sure thing. There are many members on OKCupid who are "just there to take the quizzes." Something about the way the site is set up just makes you want to fill your profile with sarcasm and snark - both of which you'll see a lot of in OKCupid profiles. I'm drawing a parallel between sarcasm and snark and emotionally unavailability because lack of sincerity doesn't seem to me to be a healthy trait of someone you're just getting to know.

I'm just speaking from experience on this last observation. It would be interesting to scientifically break it down: how much sarcasm and "angled" emo-esque profile photos you see in OKCupid vs. Match.com.

Additionally, OKCupid is a free site. In my experience, people who pay for their online dating are more serious about actually going on dates.