I tried this with one hub (a poorly performing one, on the theory that any increase in traffic would be noticeable!). I didn't see much of an increase in traffic, but perhaps this might have been due to it being a less popular topic in the first place.
I would recommend trying SheToldMe with several hubs on different topics before coming to any definite conclusion. I don't think my tryout is sufficient enough to tell if SheToldMe works or not. The reason I stopped with SheToldMe is because it felt like 'work' to me, whereas writing hubs feels like 'fun'.
I'm interested to see what others have to say on your question.