They didn't call themselves anarchists, so i wouldn't either, but as MD said, and as you, anon, imply, there were certainly anarchist tendencies.
The only thing that i would add to MD's response is that there was a group in the 60s and 70s that really changed anarchist theory (at least for some anarchists) for the better (as far as i'm concerned). that group was the situationists, and the two things that i would say they added to anarchist thought (again, they weren't anarchists themselves, but i would argue were closer to anarchist thinking than many anarchists are) were first that current society is bad for everyone, not just the most downtrodden. so even the rich and powerful are miserable and powerless (in some significant ways). Second, that every day life is where real struggle happens, not (or not just) in history-recognized rare events. (there was overlap here with the feminist line that "the personal is political," which has been subverted to mean the exact opposite, but that's for a different post.)