I don't think that your typical woman has had a lot of work done...or maybe I'm just running in the wrong social circles. I'm sure that botox and facial peels and crap are becoming more common, but hardcore surgery I don't think is mainstream for most middle-class women. I mean, it's pretty pricey. I *do* know women who have had breast-reduction surgery, which is currently covered by OHIP (who knows for how long). After I have kids, I may consider it too.
It's definitely not "mainstream" I agree. Probably like under 5% of the female population has ANY sort of cosmetic surgery done. Although look into say; women that frequent a gym and it's probably more like 10%. Strippers? Probably 50%+. Women that compete in bikini or some kind of fitness competitions? Try closer to 70%. The more they care about their appearance, or depend on their looks to make money the more likely they will spend money for surgery. It's pretty common sense.