Thanks for verifying that.
I run premium in virtually everything I own. As you've said, it runs better.
I believe that the better running = better fuel mileage which seems to offset the additional cost somewhat. On my fuel-injected 3.8's, I honesly believe that the ethanol-free fuel is easier on those expensive fuel injectors, too, AND the additives help to keep the nozzles clean.
Perhaps its a case of "Pay now (at the pump) or pay later?"
My old 1993 GMC "ta-da-dump" truck gets the regular fuel.