That is almost apples and oranges Martin. A lot more people Britanny Spears than folk revival music and traditional music combined.   

I'm not sure why we even need to compare. Each has its own fans, and each has some connectivity. Who gives a rats tuches how many fans of each there are? As long as we enjoy it, does it really matter?   I don't think any of us started following folk music in all of its diverse forms because we simply wanted to be part of an in crowd.