No it won't, it will slow it down, what on Earth are you talking about?
I agree 100%,it is generally excepted that until your ammonia and nitrites fall to zero and the nitrates have begun to show in measurable amounts you are actually prolonging the cycle.
In essence you are diluting/replacing the first two(ammonia,nitrites) with clean salt water.
Those chemicals must go through the entire process, this ensures the beneficial bacteria have established and colonized to continue breaking down the those more harmful compounds into the less benign.
Moby