I can't tell if you were joking. I hope you were.
Boston is seriously one of the most unfriendly dog cities in the country. This is pretty much objective: based on rent biases, breed specific legislation, few low cost clinics, lack of dog runs or dedicated dog parks, lack of community events for dog owners, less than ideal public transportation, expensive pet sitter and dog walker prices, irresponsible dog owners, among other things. (Note: I will add more drawbacks as I think of them).
There are some benefits like access to Angell MSCPA (though this does not come cheap). Even holistic pet stores are few and far between and it can be a headache to not just get to a vet (taxi drivers are not pet friendly) but to even get to a pet store without a car.
[Note: The city of Cambridge might be slightly different, as they have their own animal control laws and separate licensing rules etc.].
Now in terms of people - they're probably as dog friendly as any group of people is in any city. You'll get those who scream at you when they see your dog on the bus and those who will fall all over themselves wanting to pet your dog.
I could probably rattle off a list of other cities which are far more pet friendly. Actually, just for fun, and based off a Forbes.com 2007
article, some of the most dog friendly cities in America include: Colorado Springs, Portland, Albuquerque, Austin, Charlotte, Virginia Beach, Kansas City, St. Louis, Seattle, and Denver. Personally, I like this Forbes article because it took into consideration expenses, number of vets in the city, pet-friendly retailers, and dedicated dog parks (per person and pet), etc. Other articles where NY and Boston show up are either about visiting the city or don't take these factors (including breed laws) into account.
From the same
Forbes article, "New York is also the most expensive city in which to care for a pet, followed by major metros Boston and San Francisco."