The great thing about Boston sports for this decade is that we have been GREAT at every sport (Bruins have been up and down). Unlike say, Indianapolis, who only has one good team to rattle about, therefore they can stand behind the entire season, we can stay behind the Sox, then move to the Patriots, then to the Celtics/Bruins and then, what do you know, we got Sox again! Seriously, you can be a year-round homer in this town.
So to say that Boston doesn't care about basketball is rediculous. Also, I remember walking around UMass when the Celtics had the worse season (pre-Big 3). Granted, not everybody was fan, but I could def recognize the die hard fans. I knew a bunch of kids that when I saw on campus, I could start up a conversation about the Celtics current state and the kid would join in.
I think this is the same thing as saying that New Yorkers don't care about the Knicks because they are in love with their Yankees and Giants. Sure, they get more attention now, but the fans are still out there.
Then again, what do you expect form the NESN haters.