Erm....wha? That might have been true for a brief period in the 1820s(admittedly, the slogan is still quite famous in the area), but Boston's only running about 7% Franco-American these days. There are actually a higher percentage of people of Jewish, German, Polish, and yes, African descent, seperately, than French(I've actually been there, too, btw. Very few French restaurants, but lots of German & Jewish delis. Quite a few Jamaican places, too). For some reason you managed to get it completely mixed up with Montreal, a city with almost quadruple the population(and over half Franco-American at that).....no offense.
OOC: Yeah, I honestly don't see Boston becoming that. Montreal is definitely a far more plausible candidate, by a *very* long shot, just thanks to geography alone, not to mention cultural history, etc.