That is about the time I want to start the withdrawals, so that works for me.
Later than that and I think it is too long.
I want to win. I could care less when the withdrawals take place if we have won.
If we haven't won and we just pull out, then we are telling all the parents of dead kids that their kid's sacrifice was a wasted effort.
One of the major comforts those parents have is that their kids were doing something necessary, right, and just.