But you never want to have a queue on any of your dynos! A queued request means that a user is waiting with no response. If your goal is to have 0 (or less than epsilon) requests queued, it takes far fewer dynos if the requests are routed intelligently

If you have 10 dynos and 1000 simultaneous requests, the difference between naive and intelligent might well be reduced, but that's also a scenario in which your end user response times would be horrendously slow and so you'd need more dynos either way