She is flutter tonguing, yes - one of those things which is either ridiculously difficult to do or unbelievably easy to learn, just a matter of luck.
How about some piano music again?Sorry folks, it does seem to get a bit rough at times, and they are sharing out the difficulty between the three of them, but I will admit I still like it.
For sheer musical artistry though, I do think Igudesmann and Joo are right up there.... and of those,
http://www.youtube.com/watch?v=QKZITB_r8t0...feature=related is my favourite. Their piano lesson one is too close to the spade-wielding piano teacher one, I think from Australia (?) which I just cannot find funny.