While Ms. Hahn is the bigger star by far, Hauschka is clearly the dominant personality in these improvisations. On the album Silfra, she seems more self-assured than she did onstage. Nevertheless, she's clearly a stunning master of her instrument and an artist of real depth for one so young.
The audience was transfixed and very appreciative of their efforts. To see such experimental music unfold before our eyes and ears, made us all feel like we were part of the adventure.
Buy the album (the vinyl sounds much better than the CD), and if they continue to tour with these improvisations, look for Ms. Hahn to grow more ambitious.