To be fair, I have to say I meet people all the time who don't understand it at all and think $randomcrappything is great at loadbalancing. If "connections go to more than one box!" is your metric, then yes, thats loadbalancing. My metric is "Do you send connections to servers that are responsive and not overloaded, maybe with session affinity" and in general most HW loadbalancer products since 1998 have supported that. So if you're not better than 1998 technology, you may want to reevaluate your solution.
Sadly, concurrency is relatively new and unfamiliar territory to many in the Ruby on Rails community.