Yes, that is correct. It is also correct that the colonists who took up arms against the Crown were fighting trained soldiers, either the King's men or mercenaries (Hessians, et al.). I know that things are different now in terms of armaments, but your use of that phrase just struck me a certain way. History seems to show that there is something about an insurgency that makes defeating it more difficult than a straightforward set piece kind of war would indicate.
True, but British military wanted to fight like it was Europe and we were Napoleon. The US military has a decade of (recent, on-going) COIN experience, and a slew of dirty tricks when the shooting starts. We don’t fight like gentlemen, we fight to win.
I don’t think it would be a slam dunk by any means. The human terrain and physical terrain of the US is far too varied and distinct for it to be easy on any organized military, but we do speak the language, and we can blend in. Those are two major advantages we didn’t have in Vietnam, Afghanistan, or Iraq.