What was the British attitude toward the American Army and what advantages did they have?

Initially the British felt the American army was inferior to them. Along the way the Americans got smart. They learned to collect intelligence from every source they could find: prisoners, deserters, couriers, and more were all questioned at length for information. Washington became deeply involved in intelligence gathering, as well. Some of his sources included newspaper publishers and mounted officer patrols. The results started to show. These intelligence tidbits all aided in gaining American victories. Throughout the campaign, there was always great emphasis on intelligence. By the time of the Trenton and Princeton victories, the intelligence had grown more sophisticated as did Washington in his leadership of the troops.