Would to God all Christians experienced the sanctifying power of the Body and Blood.
Alas, first one must believe they ARE the Body and Blood....
This is a bit misleading. The notion of a "moment" of consecration did not exist in the ancient church but was a later development. That is not to say that the ancient church did not believe that the bread and wine become the body and blood of Christ.
Even when the notion of a "moment" did develop, there was never total agreement as to the moment. In the East, the "moment" came to be seen as the invocation of the Holy Spirit, while in the West, it came to be seen as the words of institution. There were some who professed that the "moment" ocurred at the offeratory. So, while it can be stated that the issue has been settled (and settled for quite some time), it can't be said that it was ever thus.
It has, however, been the constant teaching and understanding of the church that what is offerred is bread and wine and what is consumed are are the body and blood of Christ.