From what I've been seeing, we've had a number of off-topic questions around in the past few days/weeks, such as the recent What is one word that means to matter less?. Now, obviously we have very good processes to close or delete these, but I'm thinking: on other beta sites on which I'm a member, I haven't seen nearly as many off-topic questions per on-topic. So there's the question: are we getting a higher proportion of off-topic questions?
Have we had that many really? Completely off topic questions (as opposed to just overly broad) are fairly rare really.
I also have to ask if it matters? If they happen we deal with them. What difference does it make if our ratio is lower or higher than other sites? How is that information useful to us?
The recent ones may be connected to the fact that we get a lot of questions in HNQ so it's not surprising that we get people coming in who are not familiar with what is on or off topic here.
I have not done much for beta work other than this and software recommendations. This site does have more than SR but that is a pretty strait forward topic. I think this site will always have a little trouble differentiating between on and off topic just as a byproduct of the subject matter.