Hi!
I think it's very much what you guys said! Maria Joao Pires talk about it, there is a documentary in youtube "Technique doesn't exist Maria Joao Pires piano". I think this affirmative is quite problematic to a lot of ears, but in somewhere deep down, we all believe in it. In matter of fact, this all discussion is about personal touch. Some fellas may say Rubinstein were not a really rubato guy after all, even being old school. And Lang Lang, being young, is an interesting example of rubato guy nowadays.. Well, I think i'm not adding anything to the discussion you don't know yet, so I will stop by now and wait others to comment here!
Brgds,
Andrew