BD,
Almost all definitions come down with #1 being something like "the study of versification".
Your preferred definition is less common and less used because of it's vagueness.

"The set of speech variables, including rhythm, speed, pitch, and relative emphasis, that distinguish vocal patterns."

Wiki isn't always our friend.

My point is that clarity is essential in a critique such as yours.

Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe