Not necessarily -- I actually think it is subversively conservative. The irony of that show was that by the end of the series, all the girls had basically grown sick of their "glamorous" lifestyles, gotten married to a more-or-less normal guy, settled down, and started having children. At the beginning to the series, these girls were ultra-liberal Manhattan sluts, and by the end of the show they had all discovered that a much more conservative family-oriented lifestyle was their path to true happiness. No, they don't become bible-thumpers, but they all strongly gravitate toward more conservative family values as they realize it is their promiscuous ultra-liberal lifestyle that is making them unhappy.
I watched the show off and on over the years. I know the show is lambasted here regularly, but it was actually a slow motion deconstruction of the supposedly glamorous lifestyle of these women and how unhappy it actually made them. The story line was basically all four of those girls discovering how profoundly unhappy they were with their freewheeling, care-free city lifestyle, and finding real satisfaction in mundane tasks and building families.
I don't know if it is intentional, and you have to watch quite a bit of it to see the clear trend. For regular watchers of that show, I've seen positive influences on the way they think about such things, as it showed the real negative consequences of these women choosing to live the way they did.
In some ways, it is like South Park in that you won't see the subversive nature of it if you only see a small snippet of it and it will come across as profoundly liberal. But in the big picture, some clearly conservative ideas are being promoted as a common thread throughout the episodes.
Great realization, however, it's still not conservative enough. The "happy ending" of the series belies the fact that the "promiscuious ultra liberal lifestyle" often makes it difficult to impossible for women to transition to to family values when they are older.
Several reasons come to mind --
a)Most of the good guys of their generation will be taken.
b)Women who waste their youngest, best years slutting around may find that as they get older and try to settle down, they're no longer as attractive as they once were -- the few guys their own age who are still looking, now want younger women.
c) Fertility may be compromised by both advancing age and by the consequences of sluttery (abortion scars, STD damage).
d) Worst of all, having become psychologically attuned to wild adventures with dangerous jerks, they may find it almost impossible to settle down to with a stable, decent, "boring" guy of the sort they've been studiously avoiding all these years. In fact they may not even realize they need to make the switch, and instead of grabbing one of those nice guys they may go through the fires of hell trying IN VAIN to manipulate some wild, lawless jerk into settling down and being monogamous.
So even if women who follow the Way of the Slut, eventually figure out how wrong it is, often it's too late to have a "happy ending." It would be better advice to a woman, to attract the best husband you can get, while you're still young and attractive, and do your best to hang onto him.