Vatican II says:
116. The Church acknowledges Gregorian chant as specially suited to the Roman liturgy: therefore, other things being equal, it should be given pride of place in liturgical services.Sacrosanctum Concilium
The interpretation and implementation of Vatican II was hijacked and the wording of the Council documents contained so many "timebombs" every Tom, Dick and Jane had his own interpretation.
We were expecting a Syllabus of Errors to come out but Pope Benedict did not...
On with the party.