He is the greatest living pianist bar none.
I have attended two of his concerts. The Franck violin sonata was one of the best recitals I've ever attended. Similarly, his Chopin E Minor concerto was the best concerto performance I've ever heard. The poetry in those pieces was probably without equal today and worthy of any of the greatest artists of the last century, yet also without any mannerism or intrusion. I would give anything to hear him play a Schubert sonata or Chopin ballade in recital, but probably will never have such a chance. He recorded the Schubert D664 sonata on LP in 1969. The recording is wonderful, but I would imagine that were he to record it again today, it would be even more beautiful and poetic.
As a teacher, he is more of a demonstrator. He is always true to the score and the composers intentions.
Ron is one of the most humble, generous, understanding, and patient people I have ever met - yet, I am still inspired to work very hard by his teaching. It's unfortunate that most people have never heard of him. His studio at the university is deliberately small, but he doesn't hand-pick his students. He deserves better students than people like myself (well, he has a couple) - he could be teaching at any university in the world, but he just happens to have settled here thirty years ago when his quartet became artists-in-residence.
As a teacher, his discussion focuses (as you'd expect) almost exclusively on interpretation. He is a very "natural" pianist.
It's impossible to disagree with anything he says - sooner or later, you realize he's right.
He has been my major inspiration since I began studying with him. It's hard to convey just how much I value his teaching, as well as his extra-musical advice and support. (Once I played a concerto too fast in a concerto competition, and he told me that he played the same concerto too fast in the finals of Queen Elisabeth ... he only came second).
His (dated) webpage, with an all-too-short video clip:
https://www.geocities.com/spchuang@rogers.com/Home.htm