Yes, he will do the same thing on clay this year as he did on other surfaces last year. He will take us by storm and surprise us.
Prediction for the rest of the decade:
Federer winner: Usopen 05, 06, 07, 09 Aopen:06, 07, 10 Roland GArros:06, 08 Wimbledon:05, 06, 07, 08, 09, 10 (Roddick always runner up)
Safin winner: Aopen 08 Gasquet winner: USopen 08, Aopen 09, RG: 10
Nadal winner: RG 07 Monfils winner: USopen 10
Guga winner: RG 2010
Roddick and Hewitt together winner of: 3 sidney, 4 Adelaide, 3 washington, 3 san jose, 3 indianapolis, 2 houston, 2 memphis, 5 queens and one master series title (where Safin, Agassi, Federer and Nadal happens to all be injured).
I think he can be the best player on any surface, depends on the day, really. As far as clay goes if he shows up and plays his best he could give anyone a bad day. Nadal, Gaudio, and Coria are the best players on this surface until proven otherwise.
french is the biggest clay event by far, i cant think of a better criteria for determining best clay courter of the year.
True. That holds up better for Wimbledon and grass though. There are enough big tournaments on clay in a year that an RG result can be overriden IMO. For example I still considered JCF the best clay court player in the world even though Costa beat him in '02. You even get aberrations at GS's.