According to Sigmund Spaeth, in his 1926 book, Read 'Em and Weep: The Songs You Forgot to Remember, the interpreter of a Case song would sing in a "very matter-of-fact voice, with little or no expression, letting the words speak for themselves."
In 1906, The Indianapolis Star wrote that, "He is of a quiet and retiring disposition when off the stage, and to see him on the street or at his hotel one would never take him for a comedian who makes thousands laugh every season."