Is it just me, or does anyone else have a problem with how abruptly the timbre changes going from f to ff? It seems to be very hard to avoid it sounding like you are going more from f to fff(f!) than f to ff, IMO.

It turns what is probably pretty good technique (from what I heard) into something that sounds like they have little dynamic control at the upper end of the range, and unpredictable notes just 'pop' out wildly, from time to time.

JMO, as usual...