She's the style of artist those in the US may refer to as a folk singer (or contemporary folk singer songwriter!), so it's possibly a bit much writing to the editor as there IS a link between her and older, more traditional 'folk' singers, it's just not that obvious.
I guess she sits, rather uncomfortably, somewhere between rock/pop and folk.....the excellent version of Seeger's Waist Deep in the Big Muddy on the new Appleseed 10th Anniversary release only blurs things a little more.