I'd say the queen is smarter than an average alien, having to coordinate them an all, and that an alien is smarter than a human.
Well, maybe smarter isn't the right word, but something like that. The thing is, its a different kind of intelligence. We can build guns and rockets, and all sorts of tech., but they don't need to. Its a different kind of intelligence, but their observational skills and ability to absorb knowledge then pass it down to the next generation makes them very formidable. Its hard to equate which is "smarter" but the aliens obviously aren't stupid, and clearly smarter than a primate.