In my experience, the newer sites have improved the filtering a fair bit, though it settles down after a while. What's the best site for a dirty chat random encounter — seems like a simple question but I keep getting mixed answers depending on where I look.
Being blunt about it, I'd write a profile that gives someone something to reply to rather than test two platforms at once, since it stops you blaming the app for the profile. From the threads I've read, I'd give it a full week before judging rather than keep your expectations low for the first fortnight, since it filters out the time wasters fast.