Bishop Edward J. Slattery weighs in -

[hedgehog]

All the faithful share in the
offering, even though the priest has a
unique role. He stands “in the person of
Christ,” the historic Head of the Mystical
Body, so that, at Mass, it is the whole
body of Christ – Head and members
together that make the offering.

....

Even before his election as the
successor to St. Peter, Pope Benedict
has been urging us to draw upon
the ancient liturgical practice of the
Church to recover a more authentic
Catholic worship. For that reason, I
have restored the venerable ad orientem
position when I celebrate Mass at the
Cathedral

http://dioceseoftulsa.org/eoc/eoc200909.pdf