Gasoline and Oil prices are all about speculation toward the future. Just like any other commodity market, Oil's price fluctuations are derived from its future supply and demand.
Even hinting at the idea of offshore drilling in Washington sends Oil prices down, and a drop in Oil prices takes 24 to 48 hours to start helping us at the gas pump. So when Washington finally comes out and says it no longer has plans to hinder offshore drilling, we will see the Oil market react immediately for the better.