I believe that Mary is the Birthgiver of God. I also believe that she is the greatest among the Saints. However, she is not God, and she is not the incarnation of the Living God into a man. So while she certainly has a part in our Salvation (no Mary, no Jesus), saying that she IS our Salvation, to me, is blasphemy. Jesus Christ IS my God and my Salvation first and foremost. Everyone else is second place - even Mary. Are you saying that this confession is wrong? Do you place Mary equal with God?
BTW - it was a sign from Mary that sent me to the ROCOR. My guess would be that she does not have a big problem with me putting her second place to her son.
"The Gospel is my salvation". Would you have a problem with this statement? It essentially amounts to the same thing. The Gospel is the Good News of God becoming man for the sake of our salvation. The Holy Mother, the one from whom God took humanity, the one through whom God and mankind were united, is for us the personification of this Gospel. She, being the Birthgiver of God, is the human proclamation of the good news of her Son's work of salvation.
I do agree, though, that verses such as these require explanation, especially if the cultural context will inevitably cause the hearer/reader to assume something that is heretical or blasphemous. We should never compromise our liturgical integrity for the sake of pleasing the non-Orthodox, but neither should we knowingly present people with language that is bound to cause such assumptions without providing clarification and context. If you read the Fathers of the early Church who enforced the so-called disciplina arcani
(discipline of secrecy) - by which not only the sacraments were inaccessible to the non-baptised, but detailed instruction in the main dogmas of the faith (and the text of the Creed itself) was also forbidden to catechumens until shortly before their baptism - their reasoning for it is always the same: don't tell these things to non-Christians or catechumens because it will cause misunderstanding, mockery, and blasphemy, for which you will be held responsible.
For example, I will always confess Mary as being the Mother of God. However, I would never use the term around a Muslim (or, indeed, an ignorant Protestant) without very carefully qualifying what I mean by it. Not because there is anything wrong with the term, but because I know s/he, upon hearing it, will imagine a Mormon-like idea of heavenly procreation. Thus, my use of the term if left unqualified would not be a testimony to my faith in Christ being fully God and fully Man in a single hypostasis, but would be a blasphemous ascription of passion to the Godhead.