The English were right, it was the "American way of war", but more it was the "American Indian way of war" and the natives got it returned to them in spades by the colonials who were quick learners.
A comment on your comment: Over the 4th, the History Channel repeated it's excellent series on the Revolution and one of the things mentioned was that between the fall of Charleston and Cowpens there were something like 110/130 major engagements in the Carolinas.
When does a “skirmish” become a “battle?” Hard to say...and there were plenty here in NY/NJ also.