I understand, I am just saying the whole "users more or barely makes more energy" argument is baseless. Did they count the leftover material to be used as feed in those studies like you mention? I doubt it.
And I suprised you brought up sugar cane. As a farmer I would thought you would know that cane doesn't grow well in the US, in the places were corn does...but other crops do, like sugar beets, which have an even higher yield for ethanol.
Im not slamming you, but the amount of disinformation out there is amazing, and people are so quick to dismiss something they really don't understand.
Right now, ethanol is a little too high to make it worth changing over...but with some effort, it could be made VERY competitive, and we could reduce our need on foriegn oil which is a huge economic and political bonus.