Hard evidence no in terms of validated demographics? No, especially since it is hard to tell whether new users are Bitcoin users are not without them mentioning it, but it is pretty apparent to me that many of the new users are not Bitcoin users. Answering their questions about how to get their payments out (they have often never heard of Bittrex, Poloniex, Coinbase, etc.) makes that pretty clear for example.
But you don't know if their bfs are blocknerds who have been mentioning Bitcoin for years.
I saw many blogs explaining that females were coaxed into it by their Bitcoin bfs. It is like they get to make their bfs happy and make themselves some cash at same time. But what about the ladies who signed up and only earned 3 pennies. Do we hear from them?
You've probably read more blogs than I have. I remember some girl from Hong Kong and another from China. How is she doing?