WTN: How did Dönnhoff achieve this lively effect in 2003?

Norheimer Dellchen Riesling Spätlese trocken 2003 – Hermann Dönnhoff – Alc. 12.5% - was opened with some misgivings given the flabby nature of a lot of 03s but it turned out to be delightful with lovely aromatics of white fruit and flowers and a touch of petrol, medium body with a certain creamy roundness, minerals and mouth-wateringly lively acidity. How did Dönhoff achieve this last in 2003? Acidification? Lovely, if not quite so brilliant and long as my memories of a ND GG 06; 16.5/20.