I just skimmed what was posted from my last post, so i might have missed a lot.
I heard that ethanol damaged injectors over time as well. Something about the rubber seals degrading faster than normal because of the solvent effects it has one the oils in the rubber. if you think about it, alcohol has similar effects.
I think of ethanol as a "different fuel." it is not gasoline. I know some supercars actually can produce more HP with ethanol, but MPG decreases, that's how it usually works.