Unfortunately eye think you are correct, the impact will be felt for generations not decades, ... generations and many of them.
Two not discussed points:
Air pollution: that is why i listed the things in threes, 3 minutes with out air is not really long enough to do much evacuating. What happens when rain derived from ocean evaporation falls on land? How much pollution will the rain bring to land? How will that Corexit affect breathability of the air? The amounts of these things being pumped into the ocean are nothing short of catastrophic at best. Impacts are unknown but we are all frogs being boiled now and no way out of the water.
Methane: the "usual" concentration of methane in crude oil is approximately 5%, the oil from the GOM spill is approximately 40% methane. Maybe one of you chemists can tell me what happens when lightning flash goes through a methane oxygen mixture. And to think those fools were talking about a nuclear explosion, what insanity.
http://snardfarker.ning.com/profiles/blogs/new-photos-suffering-dolphinsfollow the imbedded links for science not corporate/gov't propaganda.