Quite true. The TMC's surface was perfect for his BH last year. He has problems with the BH if the court is too fast or at least he used to in the past. It would be nice to see him do some serve and volley in Paris this year (if he plays).
Actually I think with Roger it's always a matter of height with his backhand. He hit with a lot of depth on the BH throughout the entire USO even on clay he's always played great in Hamburg where the ball doesn't bounce as high but he's never been able to do that at RG.
However I agree the MC surface is perfect for his game, in the SF and F he hit his BH as well as I've ever seen him even he was laughing with some of the shots he came up with.
As for Paris, I have tickets for the SFs so watching him serve and volley there would be a "double treat" sadly I don't think it will happen.