Anton Kuerti was born in Austria, now in his seventies, he has mainly recorded for smaller labels, and he made a full survey of Schubert's Piano Sonatas for IMP, some of which were very innovative.
Well yet again i feel that the first Impromptu [D985/1] moved me so much, it was only 2 days ago i heard Andras Schiff play this piece [10th May 2010], this is getting high exposure in my life, there i mentioned that Leonskaja played this Impromptu slow at 12:35, well Kuerti is even slower at 12:59!, and yet he sustains the speed quite well, it's actually good to hear how this Impromptu can work slower, the first half he takes roughly 7 minutes, and the second half takes 6 minutes, so he speeds up, which gives a sense of greater flow, the very bottom line is that i prefer a more flowing speed [roughly 11 minutes], it just works better, but there's still gains and beauties about the Kuerti reading, it's not about either / or, all speeds can be valid.
Here's Talia Amar playing this Impromptu on YouTube quite fast