I don't think this came from your Bishop alone; I believe it came from the new GIRM.
It has to do with Communion being a kind of Processional. Thus the singing should start immediately after the priest finishes his Communion.
Our choir will still not conform. We had a visiting priest here from Goa, India, doing a Mission, and the choir did it right that Sunday, but my hopes were dashed this last Sunday. (Guess they don't get the idea that they are serving at Mass by singing (and not performing)!!!
One of the things that irks me, can you tell?
BTW, I am not aware of any bishop "owning" OCP.
"I believe it came from the new GIRM. "
Its not in the GIRM as such. It is a liberal interpretation.
I think the concept might have come from Mahony's "Gathering Faithfully Together", or some such document.
"BTW, I am not aware of any bishop "owning" OCP."
Our archbishop is the Publisher in Chief of OCP.
OCP is owned, one way or the other, by the Portland Archdiocese. The archbishop owns diocesan property.