Yes, it would, as you indicated, it would have allowed for more Anglos, particularly New Englanders , to settle Canada. The areas with the strongest amount of American support in Canada were the Anglo community in Montreal, and the New England Planters in the lands taken from the Acadians after their expulsion. Upper Canada was sparsely populated at this point and in Quebec, there was enough of a culture clash between the natives and the Congregationalist New Englanders (remember, the Continental Army had issues with "Pope's Day" celebrations in 1775, and a lot of the songs and rhetoric of Patriots in the war, stemming from the Cromwellian side of the English Civil War, with which most Patriots identified with, were very anti-Catholic) that there was little support to be found there.
However, it should be noted that if there is more American settlement, it means nothing if the military situation is unchanged. Georgia in OTL was probably much more Tory leaning than, say, modern day New Brunswick and Nova Scotia, but it meant nothing because the Tories were all driven out, just as the Patriots were late in the war from the Maritimes.