Interesting stuff. I don't believe any of the local stations have ethanol in their fuel. (if they do, they're not saying so) I think I'd have to go to a Shell station for E-10, and there aren't any around here. But anyway, I can tell ya, I had fresh (maybe two week old) fuel in the mower and it would not start, to the point where I had to figure out what was happening before I hurt my arm. Then when I put a few drops of the Fresh Start into the tank, it started immediately.
All in all, it's just a big unnecessary hassle, innit? :p