Maybe there's a general problem with the strings you're using with the app. Or maybe the app is lacking some feature that could improve its filtering. Have you ever asked for users experienced with that app how they make effective searches? In any case, I can't quite imagine how the existence of a one-time popup would have any noticeable impact whatsoever on the behavior of the app.
If MR did implement your suggestion, the questions themselves could float a whole new raft of questions in the iPhone forums: "Why did I get this $#!! pop-up question?" "That message wasn't really true: my iPhone does have two speakers." Other users would just ignore/forget the popup. Some might demand that MR start having popups for their pet issue. What about when posters start a new thread with an
excessively vague topic? If thread-starters always used the perfect thread topic, then all searches would be
dramatically improved!