The reason for this independence (of New England from Britain pre-Revolution) was that their ultimate dependence was on God, not on England. And thus it was that the Pilgrims, who had almost nothing of their own, learned in their very first year that God would see them through anything. And the Puritans, who were a little better off, from the beginning trusted God to show them how to take care of themselves. He never failed them.
Early Virginia, on the other hand, never did put her trust in God, with the result that she was totally dependent on England for almost forty years.