Yeah, I do think so. I notice big differences just between Canada and the US. And then there are also big generational differences, too... ie. between GBT men born before 1970 and those born after 1980.
I mean, on a fundamental level people are people, absolutely. So on a fundamental level all queer people are more similar than they are different; however, I think culture and cohort have a massive influence on how queerness is expressed, culturally speaking. I don't know about where you're from, but around these parts there are a lot of older queer guys who bemoan what they see as the heterosexualization (for lack of a better word) of young queers...that we younger queer guys are, as they see it, trying to fit ourselves in to a heteronormative mold. And while I do see a fair number of young queer guys around here who are not interested in monogamy, or long term relationships (and I know those two are not mutually exclusive), there are probably just as many who want those things. My guess is it's because we can have them now.
But in places where people can't have that so easily I think non-monogamy is going to be much more the norm because those queer guys who want monogamy (or, as I've often heard, like the idea, but can't be bothered with the "trouble" of more than one partner) without experiencing a lot of social and cultural blowback.
And here I am writing a novel. Haha.