The Obama Administration was quick to claim this was going to be the "worst" environmental disaster to hit the United States. Comparing it to the Exxon Valdez.
Of course the type of oil, location and accident were apples and oranges. The frozen waters of Alaska made the oil stick together and cling to everything. And the Exxon Valdez was a ship close to shore, not a platform 80 miles away from the nearest coastline. So the predictions of some massive oil slick hitting the gulf coast beaches never occurred.

I would imagine that there are still heavy plumes of oil beneath the surface, and these will eventually sink to the bottom of the gulf, in deep water and never reach the shore.
If you watched the news reports over the past 100 days, we didn't see the same massive death to fish and wildlife that occurred in the Exxon Valdez accident. More indications that these accident while large in size differed in scope and scale. Much of these is due to teh type of oil, distance to shore, weather and climate.
It doesn't surprise me that the "investigation" into the Deep Water Horizon accident would also include questions about why the oil rig sank so quickly with the loss of 11 crew members. Part of the puzzle would include safety issues and the emergency response from the Coast Guard. The review appears to indicate that the Coast Guard didn't follow it's own plan or provide a commander capable of directing the responding fire boats in the most effective manner which may have saved lives and prevented the oil rig from sinking. The Coast Guard were simply unprepared for such an accident or to respond quickly to a massive accident and fire.
