very interesting debate. i'll throw in my 2 cents with my own experience driving my accord. keep in mind that this is coming from a person who knows jack about cars. (but i'm learning)
i got my 2003 accord coupe 2 weeks ago. the salesman filled up my tank with the highest oct gas available. so i drove my car around until i needed to refill it.
i usually buy my gas at arco, rotten robbies, or olympic, basically all of the cheap ass gas stations.
i noticed a significant difference in power with my accord after i drove around in arco gas. with the premium gas that the salesman filled up, my car felt a whooole lot faster and the acceleration was a lot snappier. with arco gas it feels more sluggish.