Great comeback from Davide - I became a fan after seeing some incredible scenes in his match against Paradorn at the US Open. No doubting that he has a will to win above many other players.
As to your question, I don't know exactly what you mean
If you mean, and it is more likely, that he is the first veteran to reach a career high ranking at his age, probably not...although a name doesn't spring to my mind at the moment. Pozzi was better at about 33-34. But yeah, as a rule most players are declining at his age.