It's mind-boggling to watch the totally traditional program (four disconnected pieces of music, each with a different dance rhythm) with which Torvill and Dean won Worlds in 1981 and then watch Mack and Mabel. They revolutionized ice dance in the space of a summer. It's hard to know what to compare that leap to--The Beatles going from Beatles for Sale to Rubber Soul in less than a year?
And agreed: great topic, gkelly!
If I'm remembering correctly, their first WC gold in 1981 was skated to selections from Fame. It was pretty conventional, nothing special. It gave no hint of the revolution that was to come.