We're all Irish
Census data is helpful here. About 54% of Boston residents identified as "white only" in 2010, and of course only a percentage of that percent would identify as fully Irish. So... nope, not all Bostonians are 100% Irish, by any means.
We have no fashion sense
Sure, we used to have no fashion sense, like, in the ‘90s…. when no one did. But the town has gotten downright flashy in the last 10 or 15 years. OK, in the winter, North Face and L.L. Bean still abound, but that also owes to the vastness of our college-kid populace (and the phenomenal cold). It doesn’t mean we’re not killing it underneath those top layers.