Prime Minister Perceval (1762-1812)

Prior to the declaration of war for the War of 1812 (which occurred on June 18, 1812):

On May 11, 1812, an assassin killed British Prime Minister Spencer Perceval, which resulted in Lord Liverpool coming to power. Liverpool wanted a more practical relationship with the United States. He issued a repeal of the Orders in Council, but the U.S. was unaware of this, as it took three weeks for the news to cross the Atlantic.  [Wikipedia]

Could faster communication prevented this war?