In 1948, she was the reigning Canadian, North American, Olympic, and World Ladies Figure Skating Champion. She was the only non-European to become European Champion twice, in 1947 and 1948. In 1948 Dick Button won the Men's title -- they were both on their way to the Olympics. After 1948, the European Championships were limited to skaters from European members.
Commentator PJ Kwong wrote an appreciation for CBC:
Barbara Ann was one of the eight Olympic flag bearers at Vancouver in 2010 and they were all assembled in a secret location when Wayne Gretzky walked in and said: "My, my, the two greatest skaters of all-time -- Bobby Orr and Barbara Ann Scott."
This is a great (long) interview that Allison Manley did with Scott in November 2010:
(It can be downloaded from iTunes as well, under "Manleywoman SkateCast.). It's got great insight into what figure skating was like in the mid-20th century.
Rest in peace Ms. Scott.