The number of turns granted depends on the accordion used.
References
The skill, "The Power Ballad of the Arrowsmith", is a reference to the pop/rock band Aerosmith, who are believed to have taken their name from a book by Sinclair Lewis, entitled Arrowsmith. Many Aerosmith songs can be classified as power ballads.
The poem The Second Coming by William Butler Yeats includes the lines, "The best lack all conviction, while the worst/Are full of passionate intensity."