I vehemently disagree. Lavarnway has done nothing at the big league level to show he's anywhere near ready to be a catcher. His CERA with the Red Sox is 5.58 and his OPS is .519.
I think Salty has progressed defensively. It's reflected in our pitching performances. We're now T2 in the AL in ERA.
In the last 7 games Salty has caught starts by Aceves, Morales and Doubront. And all of them have been solid outings and wins. Salty has to get some credit.