I've only heard the previews once, but I remember liking "GIRL TALK" more.
Namie is a great artist, IMO. Definitely in my top five. The first song I heard by her was through the Avex radio...in fact it was the first song I remember hearing on the radio itself.
It was SHINE MORE. I remember not thinking much of it then, but now I love it. I didn't recognize her as an amazing artist, however, until I heard Put 'em Up, which is still my favorite Namie song. (I like the PV a lot too...she's so pretty!)
I recently got Concentration 20, and at first it wasn't really my thing, besides How to be a Girl, in which I loved the PV. But now I love it. So yeah, it's an acquired taste for the most part.
I'm really anticipating a new album. It should be good!