There is no black and white in all of this. MM touches on some great points but it is not always possible to negotiate how something is reported. Many of the lenders have boiler plate approval letters they will not change.
I have closed several with CW. Its a matter of not messing up the process and peristence/patience.
Still, I am stunnedat how little impact the short sale had on their credit. They are good responsible people and would have done more to offset the loss if I hadnt negotiated it away. I am thrilled for them as they are one of the rare short sale clients I have that truly deserved a break.