Wow! Great review, as always, but what really drew my attention was Patrick's nice pronunciation of "pianissimo" and "fortissimo", which are Italian words, but we also use fortissimo in Spanish. Kudos!
The comment Patrick made about Mason and Hamlin outsourcing their carbon fiber action is a bit of a mischaracterization. Wessel, Nickel. and Gross is a sister division within the company and the action is made specifically for Mason and Hamlin. WN&G also markets versions of their Carbon Fiber action for other pianos. I have the WN&G action in my Steinway B, including the hammer shank (Flex 2). I’ve had it for 5 years. It is an EXCELLENT action. I play a lot and the regulation is still spot on. I can say that I have played the both the Kawai and the WN&G action and both are excellent! Most Kawai’s are weighted a little heavy for my taste. But they are excellent pianos. I don’t know why Kawai has never implemented a Carbon Fiber hammer shank though.
Funny I should read this comment today. I tried a GL10 here in Denmark yesterday, and was surprised to hear that there was a small extention of the sustained sound when I depressed the pedals.