In 1981 Sorensen, who started the race with the really high start number 30, won her first World Cup downhill run in Haus im Ennstal ahead of the German Irene Epple and prevented her first World Cup success in a downhill run. In January 1982 she made a double strike in the double descent of the SDS races in Grindelwald , winning twice on the same slope within 24 hours. Before her, only the Austrian Annemarie Moser-Pröll and the Swiss Marie-Theres Nadig succeeded .
Motivated to have already won the World Cup final rehearsal, Sorensen could not be stopped in the World Cup downhill either. The Canadian won in 1: 37.47 minutes ahead of the American Cindy Nelson (0.41 s back) and her Canadian compatriot Laurie Graham (0.44 s back). With these successes she rose to number one on the World Cup FIS list.
After a less successful 1982/83 season - the best result was a third place in the second descent from Val-d'Isère - Sorensen returned to victory in Puy-Saint-Vincent (France) in January 1984 . With fifth place in the subsequent Super-G, she was able to win a combination for the first time.
At the 1984 Olympic Games in Sarajevo , she finished sixth in downhill skiing. Sorensen resigned from active skiing in 1984.