Which source is considered the "higher" authority? It seems in this case that Tradition is contradicted by (but nonetheless trumps?) Scripture. Still, this should be read as a University Professor's attempts to interpret Benedict XVI's Nov 30th address within the context of various earlier doctrinal pronouncements, and not explicitly as the words of BXVI himself.
I rather wish sola scriptural folks would emphatically obey 1 Corinthians 14:34. It'd silence at least half of them.