To try and battle this I bought a fuel tester here.
Really nothing more than a graduated test tube and some water wouldn't do, but the kit is very handy. Went around my area and tested premiums from Exxon, Chevron, Shell, and Valero. All of these pumps had a shared hose and handle for regular, mid, and premium which means I had to run a gallon first to get a good premium sample. All had ethanol content from 8 to 10 percent. Most disturbing was that two samples had a cloudy appearance right out of the pump indicating early phase separation if I have that correct.
The good news is I found a station that sells pure gas 15 miles from where I work.
Would have hoped for 93 octane but I'll take it over the 10 percent.
BTW for whatever good it may do speak out here http://www.fueltestkit.com/fuel_choice_petition.html