Well, the EPA's dropping the oxygenate requirement is having an immediate effect on the East Coast-

Colonial pipeline (one of the primary pipes for the entire coast up to NY) will stop sending gasoline with MTBE starting this week, with the pipe to be basically cleared of all grades with MTBE by early April (it takes up to 21 days to get fuel from Houston to NY). All gasoline shipped will be for blending at the terminal end with ethanol, or not oxygenated at all.

So if your area is not an E10 region, and the terminal/distributors by you are not yet equipped to blend in ethanol, you will get pure, straight, unoxygenated gasoline. Good for MPGs...

Oh, and from reading their ship plan, the summer fuel (high vapor pressure) will start to pump from Houston about next week. So it will be in your tank about 3-4 weeks later.