G+ is absolutely a ghost town on everything except SEO, photography & tech news.
The company I work does womens fashion marketing for bigger e-commerce sites retailers and designers. I was researching over the weekend to find any designer on G+ and couldn't find anything. There are some active bloggers but most get no +'s or the profiles havent been updated since 4 or 5 months ago.
From my 2 or so hours of research trying to find any thread of activity, most women sharing content are definitely not doing it on Google plus.