Aristotle A. Esguerra of Confessions of a Recovering Choir Director has saved me the trouble by intelligently fisking an article about Fr. Jan Michael Joncas’ plenum address on differences of musical style.
Update: Due to a misspelling in my title (which I will leave as is) Alicia ask "is the word ‘impoverising’ a cross between improvising and impoverishing? If so, brilliant!" Unfortunately I can’t claim credit for the slip, but I like Alicia’s interpretation as directed towards the liturgy and ‘Impoverising’ is a good word-merge to describe it.