How is the performance of Shakespeare's texts made special? Does each performance have an independent relationship to the text, or are performances related to each other? This article presents findings from a corpus analysis of recordings spanning eighty-five years from 1930 to 2015. Several factors changed scholarly views on Shakespeare (both text and performance) in the Twentieth-Century, ultimately tipping the balance away from the metre of the text, towards the meaning of the text in terms of performance. The results of a corpus study of 61 recordings contribute to our knowledge of how Shakespeare's plays are differentiated from ordinary speech not only by the text, but through performance, as well as how Shakespearean performance is evolving over time. Three aspects of speech prosody, specifically tempo, rhythm and pauses, are analyzed computationally. Evidence suggests that tempo has decreased while rhythmic contrast and amount of pause has increased. The role of metre as well as enjambment and caesura are addressed. The results are consistent with the conclusion that the metre of Shakespeare’s verse may not have had a large influence on the spoken rhythm of professional performance for nearly a century.