I know this is an old thread but i'd like to comment anyway:
The father of the tuner of the concert hall that i visited told me that:
- Pletnev changes the depth of the keys from 10 to 9.75 (sorry i'm no specialist i don't know what it means)

- he sends 2 or 3 pages by fax a few days before the concert to inform the concert hall about the necessary adjustments to the piano.
- on the day of the concert he trys 3 piano's

and chooses one with additional instructions for the tuner.
i heard him twice in 6 days and my conclusion is:
- he plays some pieces incredibly well

- others really horrendously.

It is clear that he did not polish them up and played them on the concert to get the money and go. It might of course be because of his busy schedule (conducting etc...) but i think it's a true shame that a person as talented as that performs like that especially when after the concert he receives a standing ovation: this is not good for the education of the public and no service to classical music.
An horrendously performed encore Ballade no1 from Chopin then came our way as if to say: "i'll give you what you like: something well known but you don't know anything about it !"
PS: horrendous = horrendous in relation to what this amazing artist can achieve.