Does a decision for Christ = salvation?

I recently heard of a local church who had over 400 decisions for Christ within a month. My question to those reading this blog site is this: "Does a decision for Christ equate to salvation?" Maybe another way to ask the question is this: "Does the Bible speak of conversion in terms of making a decision for Christ?" For some people this may be splitting hairs but I think it is important to understand the background of what has been called "decisional regeneration."