The Nelson touch is one of those factors the Yanks don't quite understand. The Royal Navy is brought up on a tradition of heroics and daring deeds, but also as the Senior Service it has a duty to be seen to do things above and beyond the call of duty. During the battle of Crete in 1941 the Royal Navy was taking heavy losses while trying to keep the invading Germans at bay, and also during the evacuation. The losses were so great that it could have shifted the balance of naval power in the Mediterranean, something the Allies could not afford. During the evacuation Admiral Andrew Cunningham was determined that the "navy must not let the army down." When army officers expressed fears he was losing too many ships, Cunningham said that "It takes three years to build a ship, it takes three centuries to build a tradition."
I also have a personal story regarding the Royal Navy's determination to help the Army at all costs. When I was in Bosnia in the winter of 1995 we had a serious casualty who had been shot in the head. He needed an immediate casevac but the RAF refused as there was a blizzard blowing and it was too dangerous. The man was going to die if he didn't get to a field hospital, so a RN Sea King crew flew in and got him. The weather got worse and at times it was a complete white out, but it never deterred them. The lad survived.
I also think that the American military mindset at that time was totally different from the Brits. Most of the senior officers in the US Army were Vietnam vets. In Vietnam the main effort was a body count, regardless of cost. If the US Army/Marines took a position/location from the enemy, they counted the bodies and moved away, allowing the enemy to retake it and consolidate. The Brits however, were more dogged in their approach. Generally, if it takes that much effort to take the position then there's no way we are giving it back. There was no way the British could sustain a lengthy campaign in the South Atlantic, so all that hard work getting there would have been wasted.
Another thing that might have thrown the Yanks was that at that time the Brits main effort was on the North German Plain where they trained for a holding action against the Red Army, waiting for the US to come and save the day (Hollywood anyone?
). What they forgot was that we were trained to counter attack locally to exploit weaknesses and disrupt reinforcements. That would have been done at Brigade and Battalion, even Company level. Just as the attacks were in the Falklands.