I think maybe it was true that the blue collar fan was most prevalent. back in the days of the old Garden and elevated Green Line, I think was probably the population. But I think that was more the population in town at that time, vs specific to the sport. Hockey didnt require tons of money, it was played outside and accessible, and there is a physical component. Heroes were guys who were all "regular Joes" whom fans could relate to. Lunch pailers if you will.
With the expansion of the NHL and "more targeted" marketing a new fan base is introduced to the world's greatest sport. Now you have a mix.
My dad use to remark when we watched games on tv that the Canadian fans were "so dressed up" with ties on, etc. (I remember that distinctly).
and I bet if you carefully tracked it, you'd find that yes, the female fan base has increased exponentially and are not just casual fans. It is always my rule that if I was going to the watch hockey, I needed to be a student of the game and not just a fan, because as a woman, I wanted to be able to contribute to the conversation and not hv people as me if players are "cute". I drove a guy out of the Lodge seats once because he challenged me to name the players on 4 lines. He was a Rags fan, and he only asked once. Before I got to ...Samsonov...he was gone.
So, they'd do well to include females in all their marketing.
Anyway....I think in Boston you find a loyal, intensely invested fan base of all types now. However, the blue-collar feel is definitely still there.
Having gone to a game in AZ this past fall...its a very clean, cordial experience, where as in Boston, you gotta be ready to put up or shut up.
Wouldnt have it any other way.